I've got a 37 UK Gallon Tank and I'd like a Blue Phantom Pleco and a Queen Arabesque Pleco in it but will they get on? And will they both fit? I've read that Queen Arabesque get to about 5-6" and Blue Phantom get to 7". Correct? Obviously I'm asking so I can research before I go and spend a load on plecs for a tank that isn't right for them.