My filters on its last legs. Looking at an aqueon to replace it. Don't much like the bio wheels. Any thoughts on the difference?
The aqua clears hold more media, like your bio wheels, that's their advantage.
I'd run them both together for a month. If the bio wheel doesn't make it that long transfer as much media as you can into the new one. If it does make it that long then you can throw the media into the other one to help it instacycle.
The power going out won't cause the water to somehow disappear from the filter. The only time you need to prime a bio wheel or Aquaclear is when you do a large water change and the water in the filter drains into the tank due to the low water level in the tank. Having a lose of power won't cause this.
I have several Aqua Clear filters of varying size and they all drain as soon as the power goes out. If I'm home, I have to remove the intake tube and add water to the filter to keep the media wet. If I'm not home, my media drys out and they don't restart when the power comes back on.
Edited to add: They do restart, but the impeller pump runs hot with no water in the filter
Well fellas and ladies, without thinking of anything else besides filtration, what wins the aqueon or the penguin? I need high filtration in my tank cause I got some messy little guys. Been keeping up with the bio wheel with big water changes, 30-50 percent, and still feel like I need more.
For a 90g, maybe you'll want to consider two canisters or one canister and an HOB especially if you have a huge bioload. You'd be able to stuff a ton of bio media and mechanical filtration to support that.