In addition to those things, if you have the sponges for your PH's you could throw them on for a day or two. Use a turkey baster to stir all the detritus up a few times a day, so it can be trapped in the sponges.
the hermits had a feild day with the snails and wreck havoc on my tank
I don't use hermits for this reason. If you think your clean up crew is lacking, I would suggest possibly adding a small serpent star, a shrimp or two(peppermint, cleaner, etc.), and ditch the hermits for more snails. Use a few different types of snails, ex. astrea, trochus, nassarius, etc., for the best results since some tend to eat different things. My snails would actually go into my skimmer all the time, before moving it to the sump. I would still need to clean it periodically though, to prevent too much detritus from accumulating in it. No way around manual maintenance
I'm glad to hear everything is going smoothly for you.