Possible saltwater issue Edmonton area

[fencer]

Yep ....I use ro di water happens. Just pick it off you eventually win. Some time if they get large enough they just float off and you can grab them then. I had an epsiode and it took about a couple of months to get rid of them.....They love to attach to staghorns

[chevyjaxon]

yeah i have some weird stuff growing too mostly red slime on the rocks not too much though i just use tap water as well