The filter doesnt look big enough to handle goldfish waste. Can you get another filter to run inside the tank as well?
You need to get lots of air into the tank as well, does the water fall into the tank again?
You have to do the best you can so do water changes each week and hopefully your fish will get bettter.
You need to get lots of air into the tank as well, does the water fall into the tank again?
You have to do the best you can so do water changes each week and hopefully your fish will get bettter.