Slight Nitrate spike again, is this normal?

[jandc805]

My tank is a FOWLR and it has been running for about 6 months now. After my cycle and numbers were at 0 everything was good till about 3 months ago I had a slight spike that went up to 15 or so and I found out I was overfeeding them causing this. After weekly water changes and twice a day feeding instead of once I brought my nitrate down to 0. It was good for about a month or 2 and now it has slowly started going back up and is at 10 now. Nothing has changed other than I had 2 new fish but 1 died and removed it within a few hours of it dying cause my HC's were starting to eat it. Are these nitrate spikes normal?

 

[melosu58]

Something has to cause it. Fifteen is not a bad number for a FOWLR tank. Sure 0 is the goal but if it was me I would feed every other day. Been doing that in my tank for 14 yrs now with no problem.

 

[jandc805]

Thanks for the advice I'll try different things here or look for something unusual.

 

[crister13]

Do you have dead spots? There could be stuff accumulating there and breaking down.

 

[jandc805]

I dont think I do, its a corner tank and I have 2 750 Koralias at the top sort of facing each other just a bit angled away from each other and I see movement all around the tank, I can maybe try different angles, didn't think about that,
Thanks