If you do have or did have GHA, do you prefer a natural way of removing it with a clean up crew and manual removal by hand and suchion.
Or do you prefer to use chemicals?
For me it depends on how bad it gets, if it's really bad I'll use a combination of natural (Extra CUC) and chemical (Hydrogen Peroxide). Otherwise I'll use my CUC to battle it alone. However this is only after figuring out what caused the GHA to take over in the first place and coming up with a plan to solve that issue.