20 - 40 ppm nitrate is it safe
I have a 29 gallon aquarium that has been set up for around 8 weeks. Here are the current parameters as of yesterday.
PH - 6.2
Am - 0
Nitrite - 0
Nitrate - somewhere between 20 and 40
KH - 4
GH - 5
Everything zeroed out about three weeks ago and I can't seem to get the nitrate below what's listed. I have done several large water changes, increased my plant load, been very good about getting any decayed leaves out. Algae has only been an issue once 2 days ago after I added my second light. There were fish in the aquarium for a couple weeks but I took them back to the LFS 4 weeks ago. I am a truck driver so the aquarium only gets touched once or twice a week and all the equipment is on timers. Any advice would be appreciated.