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The fish load shouldn't be of any issues for a 50gallon tank. The filter is merely a backup for the plants in case they are not doing well..better to have bacteria than algae. If the chlorine killed the bacteria in the filter somehow, the plants if growing well should remove the ammonia rather fast unless the quantity is substantial. Do you see strong growth from all the plants in the tank before the problem or just results from test kits? Oh, one more thing...did you remove all the dead critters that were killed by the chlorine? It might well be the problem there... :shock:
 

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Aquoi, plants do prefer ammonia over nitrate in terms of N uptake. The issue here is that ammonia causes loads of problems...green water, dead critters if too high and loads of algae problems.
 

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Shane, you need to find the source of the ammonia (in your case dead critters) both in the tank or filter and then remove as much algae from the tank as possible. If plant mass drops a lot, get more new plants in. Do a large water change after all the mess followed by a blackout of 3-5 days depending on how serious is the greenwater. Do remember to remove the CO2 injection and aerate the tank during the blackout. Make sure no light gets in there during the blackout.

If you have a diatom filter or UV, you don't need to do a blackout..just use them. :D
 

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Bad move to wait for deficiencies before dosing. Its too late by the time deficiencies starts to come in. When plants don't grow, algae hell will break loose... 8)
 

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Bad move to wait for deficiencies before dosing. Its too late by the time deficiencies starts to come in. When plants don't grow, algae hell will break loose... 8)
 
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