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I just got a button corral frag at a fairly high quality SW only LFS in our area. The person helping me said they eat zooplankton. All I have right now is phyto plankton. Will they be ok on that?
Not sure what you call a button coral, could be a zoanthedea or palythoa. Regardless, what do you have that you need to feed phytoplankton and how much are you using?
This may be related to your other post on cyano.
Yes you can get by without feeding them anything extra. Most people don't feed their palythoas. I know I don't and they are growing like mad. You should be just fine. The phyto and zooplankton aren't really needed unless you have filter feeders that really need to be fed a lot.