Will my 20 gallon have benefits with a canister and HOB's?

[Chaseg03]

It is overstocked, it has a top fin 20 and tetra whisper 40. If I add a marineland 160 canister will it have benefits. I do 2 50% changes a week. Or is it just a waste of money?

 

[Slim2634]

Canister is a waste of money for a tank that size. Put am Aquaclear 70 on it. Your current filters aren't the best.

 

[Fish Tank Travis]

What's in the tank?

 

[HarleyK]

Canisters are never a waste
Much more bio media than a HOB, less evaporation, longer service intervals. Once you have a canister, the HOB is just a drop in the bucket, might as well take it off.