I had the same experience with mine... brown algae gone in 2 days. Yes, their natural habitat is low pH soft water, but they are very adaptable. I bought mine out of a discus tank with 6.0 pH. I just gave her a nice long slow drip of 8.2 tank water (about an hour) and she aclimated perfectly. Good personality too. She's out and about a lot more than I expected and she's not afraid to headbutt the cichlids out of the way if they invade her space.tropheus duboisi breeder said:I like using bristlenose plecos. They "Do Work". They cleaned my tank spotless in less than 48 hours.