Canister filter at low level?
I have a 20 gallon long which is about 10 inches off the ground on the bottom of a metal stand. The stand has a 29 on the top. The top waterline of the 20g is obviously at the top of the tank about 30 inches off ground. I want to use a fluval canister filter but I'm worried whether it'll work OK considering the water levels involved. The top of the filter could be above the max waterline! Is it going to cause issues?