hey guys! so i noticed in my system that i lose water quite frequently! in just a couple of days my water level drops by more than an inch! is it evaporating? is it from my air pump? (rated for 240 gallon tank in a 50 gallon tank) id like to find a solution as im sure its not good for the system to be adding tap water every week!

Also a side update:
my stupid bell siphon had cut off issues weeks back and i fixed it by adding a t shaped splitter instead of a 90 deree elbow to the drain pipe. now out of nowhere its having start issues! i put on a smaller size t splitter and i tried to clean the hose but i guess something happened to the pump that weakened the flow. nonetheless i purchased a 250gph pump however like an idiot i didnt know if it had an adjustable flow rate so now ill probably need more tubing to reduce its flow and send some back to the tank!

in good news I Bought KOI! this now brings me to a total of 9 goldfish and 1 koi all plants seem to be doing well to!