what next and when? and what are these things on my glass?

[Sushiman]

A good clean-up crew is a mixed lot & are vital part of your little glass ecosystem. Cleaner shrimp are nice but I would focus on a good mix of hermits, 2-3 species, a cucumber, an urchin, then larger scavengers like cleaners, arrow crabs are great & help keep your fireworms in check. Think of it this way; what is producing waste in my system & what is consuming /removing it? If there is an imbalance you're hooped. A diverse clean up crew is one of the coolest parts of a reef tank in my opinion. I'm always looking for new additions to add to my army of creepy-crawlies. If your population is healthy enough you could have a fish die in the night & not see the carcass in the morning as your critters gobbled it up before it had a chance to rot & mess up your system. Don't underestimate this vital part of your aquarium! Good luck