Would exposure to Ammonia at the level of 0.25 be bad for fish for about two hours? The reason why I ask is because I put tap water in my fish tank today, treated, of course. After I did that, I noticed Ammo go from 0 to 0.25. This water was added after a 40%+ water change and gravel vac. I figured it was just some residue from the gravel vac, but I re-tested my tap water. It turns out that my tap water is at Ammo 0.5!!! I quickly siphoned out about 6 gallons in my 20 gallon tank (which only holds about 15 gallons of water). I purchased some drinking water which was at Ammo 0 and put it in.
The rest of the readings from the tap water were fine, just the Ammo was high. Any harm in exposing them for two hours?
The rest of the readings from the tap water were fine, just the Ammo was high. Any harm in exposing them for two hours?