Out of curiosity, do American members not use internal filters like we often use in the UK?
For example, I have two of these internal filters in my 180 litre/48 gallon tank (long story*)
And this filter in the 23 litre/6 gallon tank
And I had this filter in my 54 litre/14.5 gallon tank
* I used to have the biggest of the Biopower filters in the 180 litre but the pump stopped working. I'd had to close the 54 litre so the filter was in the cupboard. All the Biopwer and Aquaball filters use the same size pump, just different ratings so I put the lower powered pump on the filter in the tank. Then rather buy another large Biopower, I bought a cheaper, smaller version; split the media baskets between the two filters and now run two smaller filters rather than one large filter
For example, I have two of these internal filters in my 180 litre/48 gallon tank (long story*)
EHEIM biopower 160
The aquaball concept with external filter technology External filter technology and multi-layer filtration – that means: the water at the bottom…
eheim.com
And this filter in the 23 litre/6 gallon tank
EHEIM pickup 45
The EHEIM pickup is a small practical filter with a special concept The filter is simple to attach in the tank with suction cups. The special…
eheim.com
And I had this filter in my 54 litre/14.5 gallon tank
EHEIM aquaball 130
An all-round convincing concept The ball shaped pumphead sits in a ball joint and can be turned right round. Thus the outflow of the filtered…
eheim.com
* I used to have the biggest of the Biopower filters in the 180 litre but the pump stopped working. I'd had to close the 54 litre so the filter was in the cupboard. All the Biopwer and Aquaball filters use the same size pump, just different ratings so I put the lower powered pump on the filter in the tank. Then rather buy another large Biopower, I bought a cheaper, smaller version; split the media baskets between the two filters and now run two smaller filters rather than one large filter