Managed to "accidentally" go buy a pleco today... not certain of species (will post pic to try and get id at some point...) snakehead is singularly unimpressed, but seems to be leaving the new guy alone after one test bite when first releasing (bit of a shredded tail fun but not too bad)... I'm hoping the plec will help with the algae issues in that tank a bit... plus I've wanted one for ages... let's see if this will with as a tank... good news is it gives me an excuse to upgrade my freshwater tank hoping if I keep the sh well fed and provide lots of hiding spots it will be ok. I know it's risky, but fed up of snails dying on me and hoping the plec will be hardier - was only 50p more expensive than a snail as well.. just shows the dangers of going shopping unsupervised at the lfs (at least I didn't buy the gar or the p's I was drooling over)