High Nitrate after water change

[gussy]

20 gallon water change in a 90 gallon tank will do nohting to the nitrate levels. It's very hard to bring nitrates down by water change as you have to do a lot consecutively for a few days. I find it easier to connect a sump filled with LR. My fish only tank has consistent 10 ppm of nitrate. It used to be around 50 ppm for a few months and it doesn't seem to affect the fish. But then, that is a fish only tank.

 

[Shariesue]

People keep telling me that I shouldn't be so concerned with high nitrates in a fish only tank but then, I don't know who to believe anymore. I just want to get them down somewhat at least.

What is micro algae and xenia? Sorry but I don't know what all these things are and need more explanation. Thanks for your replies to my problem!

 

[crypto]

xenia is a soft coral. it's generally thought to grow better in "dirty" tanks.

macro algae are essentially plants. they suck up nitrates as food.

 

[Shariesue]

Well I don't have the proper lights to have coral and I only have fake plants for decor only.

Isn't there any critters than eat nitrates (LOL)???