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Posted by jimsworld on April 21, 2003 at 18:25:56:
In Reply to: Re: green water again posted by Linda G on April 21, 2003 at 12:48:21:
::I have 2 RES in a 75 gallon tank with a Fluval waterfall type filter. I cleaned the entire tank 3 weeks ago and got rid of all the free floating algea. It is all back again. The tank looks like a swamp and is getting worse daily. I'd had the tank for about 6 months and did not have any problem for the first several months. I hoped totally cleaning the tank would work, but it was only temporary (it was clean for about two weeks). The issue apears to be free floating algea. The tank is exposed to an exterior window which provides natural sunlight. I also sometimes use a basking light. I clean the filter weekly, but that does not seem to matter. Any suggestions? Please help!!
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First of all you have several types of algae. What you are speaking of is actually a bacteria. Green water is caused by a free swimming bacteria that thrives on higher levels of phosphates. When you changed your water you merely gave the bacteria, already established, more food. The uv sterilizer is the best bet. You can also add phosphate reducers to your tank. Change whatever carbon you have in your filter system as well..Do not change your water until you see a reduction in the coloration of the water itself...Hope this helps...
