You'll need that needle. try purple up to speed up coraline algae growth. fu man will get to big not in size but bio load for that tank. I have one in a 29 reef that requires water changes every 3 days they look fricken awsume on a reef but with your other 2 fish you'll be doing dally water changes and he eat that shrimp there a pain to switch off of live food as well a couple months of training on both of my fu mans to get them to take krill and cocktail shrimp.