Aggressive ulva, need some help

[InactiveAcct]

Want to get on top of this ulva in my 75g before it gets out of hand, a few spots it has been killing softies. Must have been introduced on bumble snails I added a few months ago. Have had a Kole tang and turbo snails the whole time, any other suggestions? Tank is several years old and otherwise healthy, montipora being too happy and growing too fast is the usual nuisance. Thanks

 

[Spare time]

Emerald crabs should munch on it.