Using model numbers would be helpful. Each brand usually has different models for different size tanks.
I have a BioWheel Emperor 400, but mine has a flow control lever that allows you to control the degree of filtration. That little control lever is located in the top of the filter. The newer biowheels sort of force you to stick your hand into the water to adjust the flow.
When I feed my fish, I'm usually holding a plate of food in the other.
Here's what my BioWheel 400 looks like. I'm going to read this link again later today..
Also if you're in the market for a filter. There's just too many options. Research them so you don't buy one impulsively.
I dislike it when I enter a store and the employees try to push a crappy cheap model on me. I would rather spend an extra $5-$10 more for a nicer model with EXTRA convenience features.
I'm interested in the Fluval & Marina style, because they're NEWER.
- Fluval HOB Filters (Look cool, but don't know much about them.)
- Marina Slim Power Filters (Look cool, but don't know much about them.)
- Aqueon (Don't like them)
- Top Fin (Don't like them)
- Tetra Whisper (Decent filter, allows for SOME basic flow control)
- Tetra Whisper EX (Newer design, but I don't like them, prefer the old version)
- Aquaclear (Good but very OLD design)
- BioWheels (Rotating wheel makes them cool, but I don't like the ones without a flow control adjustment.