I seeded my 30 nano for several months and then bought extra after I had the mandarins in it. Had a pair lost the male, just stopped eating , female came over to the new tank, the 60 but wasn’t the same after. She lasted several months then one night after coming home found her mostly dead at the surface. This time I waited it out and I’m doing monthly adds of pods/rotifers and phyto from Dinkins. I had noticed pods had started grow well in any case when using magnifying glass. Hopefully this time will work out better. Plus I’ve added new live rock 2 soon to be 4 times for more biodiversity.All very nice are the Mandarins fussy eaters I don’t know never kept them. Have you seeded your tank with copepods. I seeded a nano My fish were hunting during the day for them . Also not much green in the tank or rocks
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