I am about to buy my first hob fuge.. I have heard so many good things about them. The one im buying is 13 1/2 x 4 1/2 x 12 aquafuge. I have plenty of lr rubble and some chaeto and halimeda on the way. Couple questions, is buying a hob even worth it? Will this size make any diff? Or am i just wasting my money? Do i have to put any snails etc inside of it?