GDA in Goldfish tank

J

jmontee

AC Members
Apr 16, 2008
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1
Hello all,

I am at my wits end. I have green water and GDA in a goldfish only tank. All parameters are perfect, NO3, NO2, NH4 all 0. I have been doing 50% water changes twice a week and the stuff just comes back. Does anyone have any suggestions as to getting rid of this stuff. I have not checked phosphates but with everything else at 0 could that be the problem? There are 4 fancy goldfish in a 50 gallon tank.

Please help
 
:welcome:Stop fighting it. Goldfish thrive in gw, and alot of people employ it as a valuable strategy in grooming their fish for competition. As great as it is, though, I know it doesn't work for a display tank. The fact that all your params are at 0 make me think your tank isn't at all cycled, or that the g.w. could just be using up all the excess nutrients. How long has the tank been set up? GW usually clears up as a tank establishes itself, but to hasten the process, you could amp up the size and frequency of your water changes to a few big ones a week. GDA I'm assuming is diatom algae? That could definitely be caused by excess phosphates, but also could by symptomatic of low light levels. Either way, algae will always be present, so don't fight too hard. It's important to remember how beneficial it can actually be in our tanks.:grinyes:
 
Phosphates could definitely be the problem. Another thing to look at is your lighting. Does your tank get any natural sunlight? To control algae I only have one 40W T12 above my 125g tank. If you have more light than that in the tank your really need to look at adding plants. Duckweed & elodea are both very easy and fast growing plants that you goldfish will love to munch on.

A short term fix is a blackout which will starve all of the current algae to death. But you really need figure out the imbalance which is allowing the algae to grow.
 
Many people hate to use any chemicals, and I am usually one of them, but I have found AlgaeFix to be a great and reliable way of dealing with greenwater algae. It is safe for fish and live plants. When I have used it I saw an improvement within an hour or two, and by the next day you would have never guessed there was ever an algae problem. I highly suggest this. From what I have read the only other option is a complete blackout of the tank for three or four days.

What kind of test kit are you using?
How old is it?
 
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