Hi all,
I bet they do, and <"
it really annoys me">. Activated charcoal is actually a <"
decent biological filter medium">, once it is no longer "activated".
Personally I'd like to see a least a <"
modicum of honesty"> from the vendors of filter media etc. I'm sure <"
in the long run"> it would be <"
to their"> (and our) advantage.
I'm assuming you could use sponge. I buy the big sponge blocks they use for Koi ponds etc from <"
Rainbow Koi in Melksham">. <"
This is on a powerhead">, but I cut the sponges down for all sorts of uses. You can buy sponge sheets as well.
View attachment 217418
cheers Darrel