Pet Forum / Aquaria / Goldfish / August 2005

Get the one that turns over as close to 10x tank water per hour.

mazzbazz@hotmail.com said this:

I have a fluval 1+ on an 18*12*15 and it's absolutely adequate as f are as
biological filtration goes, it also provides enough movement at the surface
of the water to keep it oxygenated. It's not really a mechanical filter
though, so if you're after absolutely crystal clear water it might not be for
you. I've got an eheim aquaball on my biggest tank which does a really good
job - it's got compartment for various media, so if you get one with two
compartments you could go for coarse and fine filter media. I like it a lot.

hth,