Saw these at the botanic shops before but because the contents were not stated, was rather scared to try them out. Scared my fish will get poisoned or algae bloom... How many do you stick into a bunch of Macrandas and how often? So RM10 will get you how many tablets? By the way Ari, can you share with us how you maintain Toninas? I'm close to giving up on these buggers coz those that survive look really crap and almost going to layu liao...