Hello - as some of you know, I had a strange issue in the following post here:


Now I am on my way to working a new freshwater 55 gallon tank. I am four weeks in and my NH4 is down to practically zero but my nitrate test went up from 2.5 to about 5.0 (this number was pretty solid at between 2.5-3.5 over the past three weeks but just suddenly went up). PH is still blue at 7.4 throughout the four weeks of testing. Is it ok to add 2-3 starter fish (tetras) to help work the nitrate number down, or should I just continue to stay fish-less for now and do water changes 2-3 times weekly as I have been doing?

The only other oddity is that I added real plants (first time ever for me) to the tank about two weeks ago but half died and the other half were all over the place . . . so I got rid of them and went back to plastic a couple days ago. Wondering if this may have caused the nitrates to go up from 2.5 to 5.0?

Thanks . . .