I had a huge ammonia spike in my 500 gallon. I tested the water and it has a level of 2.0
why?!?!? I am doing a huge 75% w/c on it now.
I was thinking... I was going to treat a fish in my 500 so i added a bottle of melfix( treats 475 gallons per bottle) so I dumped the whole bottle in. I have heard adding medication can cause ammonia spikes. i keep my water clean and for 500 gallons it has 3 oscars, 3 rays and a arowana
I did a gravel vac and barley got and poo 
think the medication did it?
I was thinking... I was going to treat a fish in my 500 so i added a bottle of melfix( treats 475 gallons per bottle) so I dumped the whole bottle in. I have heard adding medication can cause ammonia spikes. i keep my water clean and for 500 gallons it has 3 oscars, 3 rays and a arowana
I did a gravel vac and barley got and poo 
think the medication did it?