Ok...help the new guy....I've gleaned that the "TN" in RTN and STN is Tissue Necrosis but what are the "R" and "S" for ?
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-Mark
29 Gal Bowfront w/24" LED Lights. DIY HOB Sump (5.4 Gal) MP40. Orange Spotted Watchman Goby, 2 Clownfish and a few hermits.
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