Corys seem health but...
I have a 20 gallon tank with 7 cories about 10 guppies and a pleco. The chems are ammonia: 0, nitrites:0, nitrates: 160 and ph: 6 No matter what I do re: water changes, etc these seem to be the levels I get for a very long time. Recently the corys have started coming to the surface to get air - it seems to be all of the them but none of the other fish. They seem healthy otherwise. I have a Tetra filter that attaches to the side and the water temp is always within the "green zone" of the thermometer. Should I be concerned. Should I be trying to increase the aeration of the tank and if so how?
just do constant water changes until you get that resolved, 50% water changes I would say...how do you measure your water parameter? do you have air stones? if not get those they help with oxygen. Tell us more about your equipment and your tank it would help us see what up with those unusual readings. like I said keep asking question anything that you might have in mind ask it could mean a drastic change in the health and well-being of your little fishies!!!
A nitrAte reading of 160? :shock: Which test kit are you using?? NitrAtes 40ppm and beyond will make it difficult for fish. What do your nitrAtes test out of your tap? I assume your using tap water? Also, what brand of water conditioner are you using? How long has your tank been set up??
yah 160 is very high you need to get that number down
I think that you might have too many fish in such a small tank.
What kind of cories are they?
Plecos get pretty big, you will eventually have to rehome it.
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