Bryopsis advice needed

[aschroeder]

I bought two frag rocks several months ago that have become covered with bryopsis (yes I'm sure it's bryopsis and not hair algae). I moved the two infected rocks to the sandbed to keep it from spreading. I've pulled the rocks out three times to manually remove the bryopsis. Within a week, it's back at full force. Fortunately the rest of my tank still looks good.

I'm planning to order some Kents Magnesium to dose to kill the bryopsis. I am concerned about my corals. Is it worth the risk and effort? Or should I just remove these two rocks and try to frag the coral off of them. One rock has a few mushrooms, and the other is covered with Zoanthids.

The rest of my coral include:
Frogspawn, Montipora Plate, Yellow polyps, various Zoanthid, Mushrooms, Ricordia, Cloves, and Leathers

 

[bhdmc]

I have tried this treatment and it does work. Keep the MG level over 1500 PPM. The bryopsis all died after 6 weeks of treatment. The only coral effected by this treatment were my Yellow Scroll and Button Polys, they turn pale. They did come back after the MG levels went back to normal. My SPS corals and clams had no ill effect from this treatment. I have heard there is a chance the bryopsis may come back. I been lucky, no bryopsis.