Fish Farming - Large Pond/Lake Aeration Systems

[BozZFX]

Cheers Boz. Fish, don't know yet. My stepson wants to put in koi carp. 

 

Question on your aeration principle.

 

The fish waste produces nitrites (toxic to fish).

 

Aeration will aid microbial growth, converting nitrite to nitrate.

 

Won't the nitrates overwhelm the pond with algae if you haven't lots of pond weed to take up the nitrate?

 

Other than that you have to constantly turn over the water from a fresh supply using pond water on crops like rice?

Yes the water gets regulary exchanged when available and dumped into my rice paddies next to the pond^^ the nutrient rich waste water acts as natural fertilizer... so i can save fertilizing costs for rice grow...

Its called 3step agriculture that one benefits from another...

Poultry > Fish > Rice [emoji1]

Ive just read this on wikipedia about aeration benefits...very interesting.

Water aeration is often required in water bodies that suffer from anoxic conditions, usually caused by adjacent human activities such as sewage discharges, agricultural run-off, or over-baiting a fishing lake. Aeration can be achieved through the infusion of air into the bottom of the lake, lagoon or pond or by surface agitation from a fountain or spray-like device to allow for oxygen exchange at the surface and the release of noxious gasses such as carbon dioxide, methane or hydrogen sulfide.

Dissolved oxygen (DO) is a major contributor to water quality. Not only do fish and other aquatic animals need it, but oxygen breathing aerobic bacteria decompose organic matter. When oxygen concentrations become low, anoxic conditions may develop which can decrease the ability of the water body to support life.

Sent from my GT-I9500 using Thaivisa Connect mobile app

[ozzydom]

15 hours ago, grollies said:

 

@ozzydom

 

1 rai at 1m depth is 1,600m3.

 

A stocking density of 1 fish/m3 seems light compared to tank stocking density of 100 fish/m3.

 

I understand that pond culture is different but can you expand a little on the 1500 fish/rai.

 

I'm getting my info on tank cultures here as I'm looking at an aquaponics setup, small scale compared to you guys but the info is interesting.

http://www.thefishsite.com/articles/136/tank-culture-of-tilapia/

 

Hi grollies,yes your right,ponds an carry up to 4 fish per m3, but its a matter of economies and market.

Our farm gate market used to be up to 15tonne per year but with the present climate they are more like 8tonne.

Most fish farms around here became uneconomic with feed costs ballooning and villagers disposable income way down.

We have for years practiced green water farming with only supplementary feeding ,instead of feeding 1-3 % of body weight daily we give only .05%,maintaining a healthy zooplankton and micro-organism population is critical.

The smaller fish population means I can cut aeration times to 8 hours per day (10pm-6am),water changes are also less frequently required.

We source all our mono-culture fry from Nam Sai Farm and usually get them to 800-900g in 10 months and 1kg by Easter when we usually finish.

[RedBullHorn]

edit: wrong post.

 

 

[RedBullHorn]

I would agreed with OP in terms of quantity, in fish farming it all depends on what market you can penetrate. By standard practice, Pla Nin should be harvest between 8-9 months achieving marketable sizes and weight of between 500gm - 800gm. I've done RIR farm of 3'000 layers with a setup over a 2 rai pond back in Y2K. Yes the fishes are just bonus to the eggs.

 

My stocking rate back then was 2'000 Pla nin per rai as per recommendation. I shudder at OP stocking rate of 100k - 200k...and I was thinking that it has to be Pla Duk with that kind of stocking rate.

 

In my case, if my wholesalers require the type of sizes of my produce then I would stock accordingly to their demand (as per season quota). If they need sizes of 4/5/6 fishes per kg, I would overstock to meet that demand. If their need for that season is 2/3/4/5 fishes per kg, I would stock thinner in the ponds to achieve supply. Anyway I do it I would still hit my tonnage forecast.

 

OP has a market for 300gm - 500gm.

 

Wow !!! (Claps, claps, claps...Thumbs up !)

 

 

[grollies]

42 minutes ago, RedBullHorn said:

I would agreed with OP in terms of quantity, in fish farming it all depends on what market you can penetrate. By standard practice, Pla Nin should be harvest between 8-9 months achieving marketable sizes and weight of between 500gm - 800gm. I've done RIR farm of 3'000 layers with a setup over a 2 rai pond back in Y2K. Yes the fishes are just bonus to the eggs.

 

My stocking rate back then was 2'000 Pla nin per rai as per recommendation. I shudder at OP stocking rate of 100k - 200k...and I was thinking that it has to be Pla Duk with that kind of stocking rate.

 

In my case, if my wholesalers require the type of sizes of my produce then I would stock accordingly to their demand (as per season quota). If they need sizes of 4/5/6 fishes per kg, I would overstock to meet that demand. If their need for that season is 2/3/4/5 fishes per kg, I would stock thinner in the ponds to achieve supply. Anyway I do it I would still hit my tonnage forecast.

 

OP has a market for 300gm - 500gm.

 

Wow !!! (Claps, claps, claps...Thumbs up !)

 

 

His stocking rate was 100-200k in 10 rai wasn't it?

[BozZFX]

1 hour ago, RedBullHorn said:

I would agreed with OP in terms of quantity, in fish farming it all depends on what market you can penetrate. By standard practice, Pla Nin should be harvest between 8-9 months achieving marketable sizes and weight of between 500gm - 800gm. I've done RIR farm of 3'000 layers with a setup over a 2 rai pond back in Y2K. Yes the fishes are just bonus to the eggs.

 

My stocking rate back then was 2'000 Pla nin per rai as per recommendation. I shudder at OP stocking rate of 100k - 200k...and I was thinking that it has to be Pla Duk with that kind of stocking rate.

 

In my case, if my wholesalers require the type of sizes of my produce then I would stock accordingly to their demand (as per season quota). If they need sizes of 4/5/6 fishes per kg, I would overstock to meet that demand. If their need for that season is 2/3/4/5 fishes per kg, I would stock thinner in the ponds to achieve supply. Anyway I do it I would still hit my tonnage forecast.

 

OP has a market for 300gm - 500gm.

 

Wow !!! (Claps, claps, claps...Thumbs up !)

 

 

 

It all depends on the pond size ^^

if you have for example many smaller ponds that can only hold 1000-2000 fish its perfectly fine ^^

but if you have a pond thats big enough to call it a lake and two rivers supplying water, its another story...

100-200K fish is actually decent for a 10 Rai / 16,000m3 pond that feeds on chicken manure/ poultry food/ fish food...

they have enough space and pond depth to swim freely, only thing i need is proper aeration to control the water quality and keep toxic waste down ^^

and yes it all depends on the market that you can penetrate, there are two types of market.

1 for consumers that you can find in most markets for cooking/grilling,

and 1 for industry market for making fish balls (luk chin pla).

and i only grow 80% Pla Nin & Pla Nai, the others are Pla Duk & Pla Chon.

I do 1+ million per year only with fish as a bonus to the poultry farm.

but since the last 2 years i get only 7-800K because of the horrible dry season we have been through,

and now i try to find a way to save water and keep it clean and clear for the fishes to overcome the dry season.

 

happy farming ! ^^

[grollies]

5 minutes ago, BozZFX said:

 

It all depends on the pond size ^^

if you have for example many smaller ponds that can only hold 1000-2000 fish its perfectly fine ^^

but if you have a pond thats big enough to call it a lake and two rivers supplying water, its another story...

100-200K fish is actually decent for a 10 Rai / 16,000m3 pond that feeds on chicken manure/ poultry food/ fish food...

they have enough space and pond depth to swim freely, only thing i need is proper aeration to control the water quality and keep toxic waste down ^^

and yes it all depends on the market that you can penetrate, there are two types of market.

1 for consumers that you can find in most markets for cooking/grilling,

and 1 for industry market for making fish balls (luk chin pla).

and i only grow 80% Pla Nin & Pla Nai, the others are Pla Duk & Pla Chon.

I do 1+ million per year only with fish as a bonus to the poultry farm.

but since the last 2 years i get only 7-800K because of the horrible dry season we have been through,

and now i try to find a way to save water and keep it clean and clear for the fishes to overcome the dry season.

 

happy farming ! ^^

Where you based Boz?

[BozZFX]

6 minutes ago, grollies said:

Where you based Boz?

Chiang Rai / Mae Sai 

Im from Bangkok/Pattaya and grew up/studied in Germany ^^

but i live since 5 years in Chiang Rai now and do agriculture/aquaculture.

[grollies]

2 minutes ago, BozZFX said:

Chiang Rai / Mae Sai 

Im from Bangkok/Pattaya but i live since 5 years in Chiang Rai now and do agriculture/aquaculture

OK, talking about market penetration, my daughter-in-law is a fish wholesaler in BKK. You interested?

[passedout]

Hi Boz that's an interesting aquaculture set up you've got going there. Can I ask you what you're feeding your chickens with? Are you using conventional feed along with the odd antibiotics or are you more prone to use a chemical free/organic type of feed?

Cheers

[BozZFX]

Just now, grollies said:

OK, talking about market penetration, my daughter-in-law is a fish wholesaler in BKK. You interested?

Thx for your offer ^^

my market penetration is Myanmar and Laos,

all my eggs and fishes are going across the border to Burma/Laos.

[grollies]

4 minutes ago, BozZFX said:

Thx for your offer ^^

my market penetration is Myanmar and Laos,

all my eggs and fishes are going across the border to Burma/Laos.

No worries mate, good luck with the aeration project.

[BozZFX]

10 minutes ago, passedout said:

Hi Boz that's an interesting aquaculture set up you've got going there. Can I ask you what you're feeding your chickens with? Are you using conventional feed along with the odd antibiotics or are you more prone to use a chemical free/organic type of feed?

Cheers

 Im using premixed poultry food from CP ( Charoen Pokphand ) that has Corn/Rice hulls/dry fish/small stones for digesting in it.

and every month the chickens gets eye drop vaccine.

[farmerjo]

How many rai does your chicken shed cover Boz,could you put in a false floor to collect the shit then distribute evenly  the feed or in a burley form to help your DO.

I would imagine it would be a frenzy of fish under the shed.

[BozZFX]

How many rai does your chicken shed cover Boz,could you put in a false floor to collect the shit then distribute evenly  the feed or in a burley form to help your DO.
I would imagine it would be a frenzy of fish under the shed.

Just have a look ar my profile there you can the see farm ^^

Sent from my GT-I9500 using Thaivisa Connect mobile app

[BozZFX]

The farm is directly over the water surface. 50cm - 2 meters high.
The shit goes directly into the pond with thousands of fish beneath it...

Sent from my GT-I9500 using Thaivisa Connect mobile app

[Hutch68]

9 hours ago, BozZFX said:

The farm is directly over the water surface. 50cm - 2 meters high.
The shit goes directly into the pond with thousands of fish beneath it...

Sent from my GT-I9500 using Thaivisa Connect mobile app
 

Great looking farm BozZFX.

[BozZFX]

2 hours ago, Hutch68 said:

Great looking farm BozZFX.

 

Thanks!

Only thing it needs to improve is water source for poultry and aeration for fish,

we use water from a drilled well/hole to feed the chickens, with a crappy filter system,

and the pond needs infused oxygen to overcome all the waste and toxic gas (hydrogen sulfide),

for better fish and harvest ^^

[Steve G]

Any one know a vendor for pond aeration systems. I am looking for bottom aeration system in Thailand but will consider other aeration systems. 3 Rai pond  3 M + deep

[sgraham005]

Was anyone able to find a 220V rocking piston style air pump (with or without cabinet) for sale in Thailand? The pond I have is deep, I  so need bottom aeration 

[grollies]

50 minutes ago, sgraham005 said:

Was anyone able to find a 220V rocking piston style air pump (with or without cabinet) for sale in Thailand? The pond I have is deep, I  so need bottom aeration 

Check out this video from the UK on fish farm aeration.