i have a 25 ltr with java moss on bog wood and floating amazon frogbit. tank houses 7 celestial danioes a shrimp and 3 ottoes. it has a 5 ltr sump filter and an 11watt cfl for light 12 hrs a day. problem is algae growing on moss. how do i get rid of it. less light? wont my other plants suffer. what do i do?