??? about ammonia & nitrate

[a&a2]

Haven't tested my established tank for about a month. Everything has been smooth. Tested it last weekend and to my surprise, the ammonia was .25 and nitrates at 30 or 40. These levels have both tested 0 for the past year. Any idea on what's goin on?

 

[moneyman]

You are using RODI or treated tap water? How old is your test kit. You can always confirm your result with another test kit or at the LFS.

 

[hatessushi]

Did something die in the tank or did you add any new LR or LS? Have you been performing regular water changes? If so what %?

 

[alyssia]

Originally Posted by HatesSushi
Did something die in the tank or did you add any new LR or LS? Have you been performing regular water changes? If so what %?

That's what I was going to ask.

 

[a&a2]

I do 20% water changes monthly. Nothing has died in my tank. All I use is RO DI water. I'm stumped?

 

[alyssia]

You haven't added anything new lately?

 

[a&a2]

Nope not for months

 

[xdave]

You may have just stirred up something that was assorbing the nitrate. I'd say just do about 30% water change this time and check it as soon as the water rotates through your system once, then check it again in a couple of days to see if it's still rising.