summat fishy
Fish Fanatic
errr...what do you mean by purple algae? If you mean coralline then it can take anywhere from two-three weeks to two-three months...just kind of depends, you may notice growth on your rocks immediately but may not see growth on the tank walls for several months. You're CUC wont eat coralline though, you're adding them to take care of detrius, green algaes, cyano bacteria, uneaten food, different forms of waste and nuisance nutrient exports. You can add them as soon as your water conditions are fit, if there is not enough algae growth on the substrate and rocks then you can supplement their diet with most fish foods.
ah rite thanks! thank god your on here otherwise id be lost! i want to add some CUC now, but my nitrates are 10ppm. is this ok? or should i perform a water change first and how should i do this? how often should i perform one? thanks in advance summat fishy