Air stone, wave maker or skimmer

[Kerrie Carpenter]

Hi guys - I have a tetra 54ltr tank and a 30ltr biorb. Both fully cycled and have fish in. The rectangular tank doesn’t seem to have a great amount of surface agitation and I have noticed a small amount of scum on the top-should I get a power head of some sort or wave maker or skimmer? Any help would be great. Thanks

 

[Colin_T]

Protein skimmers don't work in freshwater.
Surface skimmers can help but are often more trouble than helpful.
Wave makers can take up a bit of space, depending on type.

Just add an airstone and have a coverglass on the tank to stop bubbles splashing on the light.

 

[Kerrie Carpenter]

Protein skimmers don't work in freshwater.
Surface skimmers can help but are often more trouble than helpful.
Wave makers can take up a bit of space, depending on type.

Just add an airstone and have a coverglass on the tank to stop bubbles splashing on the light.

Thank you!