biggg problem please help many problems

[Grizz]

If it's cyano it will blow off with a turkey baster if it doz then place one rock at a time in some PWC water and use a tooth brush to clean them rinse in clean salt water looks like you may have some you sand too
My GSP acts as a barometer in my tanks it failed to open for 3 days once 4th day the cyano showed up Wife was feeding 4-5 x a day 'they look hungry' Funny but now if it dont open out come the test kits

 

[Saltghost2k25]

so i tryed scrubbing the the purple stuff on the rocks today but it wouldnt come off.. is it best if to but the rocks in a bucket and try then

 

[Ibrahim]

You wouldn't need to do that because cyano comes off pretty easily. Try to get a closer picture on the micro bubbles it may be hydroids or worse.

 

[Saltghost2k25]

my lfs store told me what i have is coraline algae not slime..and said i need to control my phosphate to reduce the green algae