Tag Archives: partial water change

I have a 30 gallon freshwater aquarium. It has two zebra fish, a silver dollar fish, a sunburst, two neon tetras, a guppy, a frog, a scissors tail and a cory cat in it. I do a partial water change almost every 10 days. I have had it set up for about a month now. I test almost every day for ph, nitrate, and ammonia levels. The ph and nitrate levels are great. The ammonia levels are always high though. I have four ammonia bags in the tank (to help control the ammonia). I feed the fish twice a day fish flakes. There is never any left after 5 minutes of feeding. I also give them a treat once a week of freeze dried brine shrimp cube. Why do you think the ammonia is always high? I have tried ammonia lock to help control the ammonia, but it doesn’t seem to be helping. I have two filters in the tank and both hang on the back. What do you think could be causing the ammonia problem? I also add aquaium salt with every partial water change. Any suggestions?