My new 5' tank for the Rhom had a layer of sand in it when I bought it, which I left in. Anyway I now have dozens of snails, which obviously came in with the substrate. I have deployed a lettuce leaf in, but it will have little effect I suppose.
I havent heard of any medications that wont knacker your filter, so I might deploy an assassin snail next week.
Rant over............
