i have a 30 gallon tank with algae only on glass, nowhere on plants or moss. i have nana petit and javafern but there is no algae on them too. but on glass it just keeps growing. on front glass i have to scrub it every other day. all parameters are good, shrimps are multiplying and every thing is going fine. but glass algae just comes back. even my co2 is high. planning to all glutaraldehyde. should i? any other suggestions?