Looking to find a grazer for my frag tank , it's 1/3 of a 40 gallon breeder. I've got a mix of snails in there now they just don't do we'll on the frag plugs. Also this is my fuge with cheato and pods so I don't want something that will be picking at them. Been looking at Hector's goby ,rainfordi goby and a tailspot blenny. Does anyone think they might fit the part ?