"David Dix" wrote in message
...
Thanks for the tip Graeme. I'll watch out for this.

How often do you check the filter media?

I was cleaning it every week almost at one stage until I upgraded to a
larger filter, I found it was quite easy to spot the "slow down" just by
looking at the tank. You may not have the problem just depends on the level
of waste you have, but overall the filter I thought was poorly designed.

Just by lifting the output above the water to view the flow will show you
how well it is doing and if it needs a clean.

The larger Internal Fluvals (2,3,4) have the media in 2 halfs and in a
plastic frame, so the water goes though the media and then up though a gap
in the frame, so you never had the issue of waste blocking the waters
outward journey - which is the case with the Fluval 1 I found.

But the tank itself you have is well made - I have one of the larger Duo
ones.

Graeme