Blind1993 I dont think you have enough light in your tank you might want to invest in another T5 light for your tank. If the zoas are shrinking in size there might not be enough. Are you adding any phyto to your tank for them to feed off. The caps I got from you are finally getting there color back... I ditched the rack for now not enough frags left. But soon. I have some new stuff that I will add the pocs soon...