IME, the Tailspot nor Bicolor, or any of the Ecsenius spp. Blennies really, are not an effective means of algae eradication/control. Find the source, the source of nutrient introduction/build-up, and you'll resolve the "problem". Problem is in quotes because, in a new tank, you can expect things in terms of species diversity, including nuisance algae, to bloom and die back regularly within the first year or so. FWIW, adding more, and significant at that, bio-load to a tank already experiencing algae/nutrient problems is usually counter-productive, especially in small tanks.