Planted Tank Guru
Join Date: Dec 2012
Location: Hot Springs Ar. 71901
The Wally World has them in the fishing dept. If you don't want to run out of batteries only run it about 10 min after the fish stop going to the top and wait till they all do again.
In the FWIW dept...in the 70's at my favorite LFS, the owner told this to everyone who even thought of buying a tank. All filter ran on air pumps then so it wasn't an if type of statement.
Put three or four fish in your tank and again on the next week till on the last time you add they go up to the top to breath. This of course is with the air pump turned off for 30 min or so.
If you stop adding fish at the first sign of hard breathing...you will have far less problems/w this tank.
This was before they knew about frequent water changes.
40 years later his suggestion still works best.
The shortest distance between any two points is a straight line...in the opposite direction...