View Full Version : are sponges necessary on return pumps?

07/24/2010, 07:00 AM
I have an eheim 1250 return on my 40b tank. The thing bogs down with "marine snow" or something like it every couple weeks. The sponge on the intake just seems to collect it like crazy.

Now, I know that the sponge collecting it mean it doesn't get put through the impeller and doesn't make it back to the display. Problem is, my flow crawls to a near stop every time it clogs, which is often. Would it be bad for the pump to run it sans sponge? I don't think the crud in my sump would hurt the internals of the pump, but I suppose the big concern is if something larger gets sucked through that COULD damage the internals. Seems like if I took the sponge off I'd never lose the flow like I currently do.

What say you all? Do you keep the sponges on your return pumps? How often do you end up cleaning them if you do?

07/24/2010, 07:07 AM
No sponge on mine for the last several years. Still using the same crappy Rio return pump on my 75 cause it hasn't failed.

07/24/2010, 07:28 AM
I've never used a sponge, I took it out of my rio hyperflo before I installed it.

07/24/2010, 09:25 AM
the sponge prefilter is the first thing to go on all of my tanks

taylor t
07/24/2010, 09:56 AM
same here - no sponges.

07/24/2010, 10:04 AM
most of the time the sponges are supplied for pond use not aquarium

07/24/2010, 10:08 AM
Sounds like you could use more mechanical filtration (pads, socks) in your sump?

07/24/2010, 11:15 AM
I use mine to act as a cushion to keep vibration down, not as a prefliter.

07/24/2010, 01:32 PM
I never use the sponge pre filter. They just seem to clog pretty quickly and then possibly stress the pump.

07/24/2010, 01:57 PM
sounds good - sponge is gone!

TripleT - The majority of it is dust from the aragonite, I think. I didn't rinse it at all before I used it when the tank was set up. It's been down there ever since... no idea how to get it out.