nitrate up a bit

[bigbill]

i did a 50 % water change to day and my nitrate went up to 20 is this normal?

[Manoj's Reef]

No its not normal. Did you check your water before doing the change?

[bigbill]

no but i allso added a fish today i did test on mon and all was at 0

[MizTanks]

50% is a lot of water to change! Why so much?

[bigbill]

was probly closer to 35% changed 4 gallons of the 12

[Sir Patrick]

I would mix another batch of water- and test it. See what happens.

[bigbill]

got water from lfs pre mixed

[Sir Patrick]

Did you test your water right before the water change? Did you stir up some nasty stuff during the water change? Did you disturb the substrate at all?

[bigbill]

yea its all most inpossblie to add that much water and not stir the bottom a bit

[Sir Patrick]

How old is the substrate, and how deep is it?