Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
Filter is not too bad...
.... for my 40 gallon breeder.
I sure would not use it on anything larger.
I do not care what the manufacturer says.
You just about have the list correct.
Since you have on hand a PH and an air pump, try either or both before buying another filter.
Yes, you need a lot more water movement than the Penguin gives you.
If you decide to keep it I would make the intake longer for such a deep tank. Try some thin wall PVC pipe. (Since I used it on a shallow tank, I do not know what size pipe to try- maybe 3/4"? That is a large diameter tube. Larger than most other HOBs).
Try the PH mounted so the water flow hits the end glass, and is diverted into the worst of the debris pile. Sort of blowing it all over the place, at first. Hopefully it will alter the water flow to work with the filter. Once the debris is prevented from settling there, perhaps it will stay in suspension until it gets near the filter intake.
Try the air right in the middle of the worst of the debris. (Same idea: Debris is not allowed to settle there)
Might take both PH and air.
Air to lift up the debris, PH to keep it moving toward the filter intake.
A second filter or replacement ought to help. I would use an Aquaclear 110 on that large tank.
Use some tubing attached to the PH, put the intake near the bottom of the tank, the outlet fairly high. Pretty much matching the filter flow. But over on the other side of the support. Put a sponge over the intake of the PH so it traps the debris. The first few days you might have to clean it often until the build up of debris is gone.