i have 7 fish 3 tetras 1 cat fish 1 thats looks like a gold fish not sure what u call them and a little looking shark fish dont have a test kit took the water to a shop have been changing water every 2 weeks but was using the gravel vac all wrong till today and got loads of muck up from the grave i didnt put the vac into the gravel ....Do you have a test kit? Have you been changing water? How many fish and what species?
ok thanks for ur helpYou will need to get yourself a test kit unless you can get your LFS to test your water pretty much everyday,
Water changes are the only way to remove ammonia, do a fe 25% water changes over the next few days and then get the water tested again,
ammonia is very poisonous to fish