narkeddiver Posted December 11, 2009 Share Posted December 11, 2009 Hi, We have a couple of shallow fishponds running alongside the paths leading to our home. The ponds are only one to two centimetres deep As the water is still it goes green over the course of a couple of weeks which means catching the fish, draining the ponds (manually ), scrubbing them down and then refilling them - all very labour intensive Is it possible to get pumps and and/or aeration units (preferably solar powered) that will work in water this shallow We're in Chiang Mai so any local leads would be appreciated Also if this is the wrong forum please feel free to bump it to the correct one Cheers Link to comment Share on other sites More sharing options...
gotlost Posted December 11, 2009 Share Posted December 11, 2009 There are Fish Pound shoppes in back of the Tessco Lotus of the supper highway. They are in the area of all the garden shops. They will may have what you are looking for. Link to comment Share on other sites More sharing options...
VocalNeal Posted December 11, 2009 Share Posted December 11, 2009 Water absorbs more air on the surface than through aeration especially for shallow ponds. So if you can move it it will absorb on its own. I can't help directly but what you need to look for is in indoor fountain or bird bath fountain. You water is very shallow if the 1 - 2cm is to be believed. Or Join them together using the ubiquitous blue plastic pipe and use a cheap aquarium pump to create water circulation. Link to comment Share on other sites More sharing options...
XCom Posted December 11, 2009 Share Posted December 11, 2009 (edited) Getting a pump and circulating the water WONT remove the green. Your need a UV filter to do this You should be able to get a combo box with the UV unit on the top and then the filter materials below. This will keep the water crystal clear and filter all the crap. Your then just have to clean the filter maybe a few times a year. It might set you back some money but save you loads of work. Edited December 11, 2009 by XCom Link to comment Share on other sites More sharing options...
VocalNeal Posted December 11, 2009 Share Posted December 11, 2009 Getting a pump and circulating the water WONT remove the green. Your need a UV filter to do thisYou should be able to get a combo box with the UV unit on the top and then the filter materials below. This will keep the water crystal clear and filter all the crap. Your then just have to clean the filter maybe a few times a year. It might set you back some money but save you loads of work. Yes but if we can get him to think about a pump then .................. Link to comment Share on other sites More sharing options...
gennisis Posted December 11, 2009 Share Posted December 11, 2009 Can't believe you pools are only 2 cms deep...that less than 1 inch...would seem like they are just damp ! ...and your fish must be very small as well. If the depth is correct maybe you can add some biggist stones..put in a pump and make it like some rapids.Fast moving water will not get so clogged with algae. Water lilies also help to keep the water clear by using up nitrogen that feeds the algae,but in such shallow water,you dont have the depth. Link to comment Share on other sites More sharing options...
narkeddiver Posted December 13, 2009 Author Share Posted December 13, 2009 Thanks for the advice folks - I'll go looking for a small pump to start off with The pond really is that shallow - I guess 4 cm maximum and yes, the fish are really small - we have a couple of goldfish that are maybe 5cm in length and the rest are between 1 and 3 cm plus lots of small fry Link to comment Share on other sites More sharing options...
Mosha Posted December 14, 2009 Share Posted December 14, 2009 Those goldfish must be scraping therir anal and tail fins in the bottom of your "pond". Link to comment Share on other sites More sharing options...
adtravels Posted December 16, 2009 Share Posted December 16, 2009 put a boom across half of the pond, add some floating plants such as lemna(duckweed) or riccia, the will cover the surface and remove nitrate and phosphate as it grows, this will stop the water getting green naturally (outcompeting the microalgae) and also providing some shade for the fish, you can harvest the every 6 weeks and throw away or put on the garden as compost, put some elodea or other submerged oxygenating plant in the other half and you will solve your problem naturally. This will only work if you pond recieves a good deal of sunlight., No electrical wires needed. Link to comment Share on other sites More sharing options...
Crossy Posted December 16, 2009 Share Posted December 16, 2009 I was going to suggest the above ^^^, use water-lettuce, readily available and if it gets too much bung it on the compost heap. Link to comment Share on other sites More sharing options...
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