this thread is 38 pages of fixes
your tank would be easy to fix
the cause is your detritus loading, either in rocks or sand.
post pics of your tank, a 34 would be easy to rip clean, just like all these:
If you are reading this thread to cure a tank invasion from a link I sent you, we do not need to identify your type of invasion here we do not need you to test anything at anytime regarding nitrate, phosphate etc Above all, we do not need to see a microscope slide picture of your invasion at...
www.reef2reef.com
-how many times did nitrate or phosphate matter there, or get a reading?
-how many times did we add slime remover or chemi clean, for all those fixed tanks
-the cause of matted invasion is sitting there and allowing it. that's not being mean, we're just showing the opposite situation above.
prediction before seeing pics: if we reached in and grabbed sand and dropped it, a massive cloud would result of the cause + invasion all mixed together.
same for rocks, if we take any rock from the tank and twist-swish it midwater, a clouding comes off.
we'd fix all that in one pass. *if you have a 1% invasion that still comes back, well it'll be coming back in a nice sharp new looking tank lol. doesnt happen very often though, per above.
of course if the reef is massive we can't do surgery on it lol and all those things matter above. but if the reef is accessible, we cheat all the waiting and hammer out cleaned tanks for years.