Frayed fins is usually an indication of:
a) nipping - are any of his tank mates pestering him?
and b) poor water quality. But your numbers look fine...
Do a large water change (50%), and add a couple tablespoon of aquarium salt (disolved first in dechlor tank water), and bump the temp up to 80F.
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90g pltd: angelfish [black, leopard, platinum, silver zebra & gold vt] · glass catfish · harlequin rasbora · neon & rummy nosed tetra · sterpai & spotted cory · bristlenose pleco
28g pltd: scarlet badis · oto cats · bristlenose
16g pltd: flame & honey gourami · cherry barbs
8g (soon to be 18g): 15 lbs LR · 10 lbs LS · YSP · zoas · shrooms · flame & hammer corals · brittle star · scarlet & electric blue hermits · firefish
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