what are awsome filters?

Any eheim filter except maybe the ecco line.

Check out an Eheim PRO II 2128 Canister Thermofilter.

what's wrong with your aquaclear 300?

We probably need more information to help you with your problem and give specific advice.

Fish info, tank size, feeding regimine..etc....may help us. You may have a problem that cannot be solved by simply adding a new filter.

If, for example, you are running a lone Aquaclear 300 on a 55g tank, I would advise getting an additional 300 to run in conjunction with the other. A quick fix that usually works for me to clear my water is to pack the second filter with filter floss and carbon.

On my 55g I run 2 Aquaclear 500's and have little problem with collecting debris and water clarity.

Again, more specifics will help us point you in the right direction.

IMO, Aquaclear has the best HOB filters made. Their mechanical filtration is awesome and they move some serious water...and they are very cheap and easy to maintain. For biologicals, canister filters are unmatched. Running one Aquaclear and one canister gives you the best of both worlds.
I used to have an Aquaclear 500 and an Eheim 2026 running on my 55g. I found that by replacing my Eheim with another Aquaclear 500 suited my filtration needs plus it got rid of alot of clutter (hoses, inlets and outlets) in and out of my tank. But each situation is different.

On my 55s, I use one one prefiltered external Eheim Classic (2215) bio-only and two internal Eheims (no longer available) as mechanical-only.

Thats basically how I used my Eheim before I got rid of it. I used it as bio only and my Aquaclears as mechanical. Having such a massive amount of cultured media really made it easy when I or a friend or 4 wanted to start their own aquariums. I would get them to buy me a small jar of new ceramics and I would give them an equal amount of my cultured ceramics. This made their cycling process go much smoother and quicker. Not to mention all the new tanks Ive created with it.....in hindsite, Im glad I HAD my Eheim. Now that I don't I am almost forced to slow down my fish keeping expansion....which is readily accepted by my wallet and my wife.

The easiest thing, IMO, is to get another hang on back filter for the tank. Grab the a new aquaclear filter and run both. this will create a better current.

And just rinse out the sponges during water changes. This will help keep things much clearer. If debris int he water is still high, add some filter floss to the media chamber and throw it out with each water change. Floss is super cheap, espeically if you buy polyester batting from a fabric store.

As far as awesome filters, AC's fit into the class pretty well. My two top picks for HOB's are Ac's and Emporers. In an unplanted tank I take the emporer because the bio-wheels are awesome IMO.

Eheim is we spoken of in the canister world, as are a few others.

I firmly believe in 2 or more filter per tank, but also like to use two of the same type simply because it's easier to stock media, and parts. If you like Hob's and your AC is doing O.K. I'd go with another of the same size AC. If you the water clarity is your problem, adjust the media within the filter. an new or different filter with the same media will produce roughly the same result.

Think outside the box on media. I custom cut sponges for all of my HOB's, and buy finer sponges for clearer water. you can also stuff floss in to really polish things up. there are plenty of options available to get whatever results you are looking for.
dave

I luv my eheim 2215 on my 66g. I think its all I need but luv.