I have a fairly new 29g biocube and was wondering how often can I add coral. I have 2 clowns (been in about 1 month), a watchman gobie (been in 1 week), and on this past monday I added 2 corals (leather, and green star polyp. I really want to add some mushrooms but not sure if it would be okay to add them tomorrow or should I wait a little bit? My water levels are great and have been steady.

pH 8.2
ammonia-0
nitrate-0
nitrite-0
Ca-420
Phos-0.5
kH-8

Thanks,
Deanna