I haven't had much luck with excel and mosses, do a quick search and youll find similar experiences. new bulbs will help get the plants growing better which will out compete the algae. you may also try reducing your photo period, or raising the light up a little bit. mosses and anubuis dont need much light at all.
I do clean the filter material with tap water. But to be honest, I don't clean it that often... From now on I'll save some tank water to clean it.
It does need the new bulbs but I had problems long before they needed to be replaced.
Tom Barr suggests using the excel if you want to do regular water changes to help keep the CO2 at a more steady level to prevent algae. But I should not use it if I end up trying a flame moss carpet?