Black Alaecide, Cheapest That Delivers.

[Carlosm]

My pool in the rainy season has developed black dots all over. After looking around for the black algaecide treatments i found dramatic variations in price and type.

So, can anyone who has used the treatments or know of a supplier, post some treatment prices (including delivery to Phetchabun if pos) and how good they are (crystal and liquid).

Thanks in advance, C.

[george]

Algaetrine. Different products for black and mustard algae.

[TireMoni]

Hi,

the best and most effective method is indeed to use Cal-Hypo Chlorine as it is 98 % full chlorine and it will eat up the black algae very quickly.

The problem with regular algecide is a) very expensive and does not carry the high chlorine % to have a good result. For black algae you need

to kill the root which is in your surface and very difficult to get rid of. Just sprinkle to Cal-Hypo on your affected areas and let it sit for 12 - 14 hours

to see how they disappear. You should use around 3 - 5 pounds for your pool and please do not add less as the result is most likely zero.

I hope this will help

[ChrislakBeeGreen]

You can also use a Phosphate remover, this will take away the food souce of the algea which means algea can not grow, no need to over do the chlorine so you can keep the pool open and swim.

[PoolDoctor]

You can also use a Phosphate remover, this will take away the food souce of the algea which means algea can not grow, no need to over do the chlorine so you can keep the pool open and swim.

Best though, is to find the root cause of the algae first (high pH, low chlorine, insufficient chlorine stabilizer, etc). Otherwise, you'll be chasing the end of a wagging tail so to speak. A friend's pool suffered the same thing - rather than dump in a bunch of chems, we visited, tested the water and found out:

1. Salt water system not generating chlorine

2. Very high pH (8.5); reducting chlorine efficiency to almost 10%

3. Zero 0 reading of cyuranic acid

4. Low salt

5. Broken foot valve in the tank meant he was refilling fresh water every couple of days and losing all chems in the process

We worked on these simply problems first, installed automated pH injector (acid), lowered pH, got CYA up, repaired the salt system, and voila. Problem solved.