Hi,
I've had my 10 gal. fresh water tank with my betta and 4 zebra danios for about a year now. Recently, my nitrate levels have been extremely high, and no matter what I can't seem to get them down. I have live plants, I've been doing water changes every other day, but my nitrates seem to go right back up a day or two after I do a water change. Does anybody have any suggestions for getting them back down? My betta has just healed up from a fin rot issue, and I don't want it to come back.
There is also a ton of black hair-like algae growing on the plants and everywhere in the tank, but I don't know if that's related.
Thanks!