09-08-2010, 11:04 PM
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Originally Posted by bigrift
ok so iv got a 30g tank well planted with 14 fish in it and all of a sudden my nitrate lvls have gone threw the roof. i have play sand substrate i clean and do 10% water changes weekly (curently doing 30% due to high nitrate starting this week). so far iv had no fish loss or plant loss but besides doing water changes is there anything else i can do to lower my nitrate? should i do more than 30%? just for the record i had moved the plants and fish from a 55g tank to the 30g tank a few weeks ago cause of a huge pond snail problem. when in the 55g tank i had no nitrate at all... maybe the snails should have stayed?
It's difficult to answer this because we don't know all the data. But in general, water changes are the best way short-term to reduce nitrate. Long-term, you need to find the cause and eliminate it. Once things are biologically balanced, a weekly water change will work with the plants to maintain stability--nitrate should not be rising and falling, it should be stable. And with lots of plants, very low; high nitrate in a planted tank means too many fish or some other heavy load on the biology of the tank.
First question, what is the exact nitrate reading? And on this, if you have the API test kit, shake regent #2 for 2+ minutes (not just 30 seconds as stated in the instructions) or you will get a false high reading.
Second, how long has this 30g been running?
Third, what are the fish?
Fourth, is it well planted or just a couple of plants?