Hi all,
What kind of filters are you guys running on your shrimp only tanks?
It doesn't matter what the filter is, you just need a sponge on the inlet. There are 2 advantages to this, it stops shrimp massacre in the impeller, and it gives the shrimp a browsing surface where small bits of food and algae accumulate. It is a win-win situation.
I'd just DIY one for your HOB, I like a big PPI10 block, because it means you can ignore it for a long time before it needs cleaning, and I don't care about aesthetics. If you want a less obtrusive look, you could make a smaller one from dark PPI20 (medium) or PPI30(fine) sponge sheet. The finer the pore size, and the smaller the sponge, the more frequent cleaning will have to be.
A fantastically attractive DIY Sponge in this thread <
http://www.ukaps.org/forum/viewtopic.php?f=38&t=20831&p=212056&hilit=darrel+Eheim+sponge#p212056>.
Via TA Aquaculture <
http://www.ta-aquaculture.co.uk/Filtration-Air.htm>, or ebay, you could buy a sponge, if you didn't fancy making one.
The other advantage of DIY is that you can make exactly the size and shape you want. I've deliberately made a couple of quite sculptural ones, without any straight edges, to see if they merge into the back-ground any better.
cheers Darrel