A little back history, about 13 years or so ago I started keeping aquariums for about 5 years. I had a 29 gallon and 55 gallon that i started and mainted with next to no problems, or so I thought. I used API Quick Start, API Stress Coat, API Ammo-Lock and API Stress Zyme. Recently, I tried to pick back up the hobby and invested in a 37 gallon setup. All was well until I brought home some new fish (Dalmation Molly and Sunset Platties) that, after the fact, I believe had gill flukes that spread like wild fire through my beautiful Sterbai Corycats, Neon Tetras and Flame Dwarf Gourami. My big mistake was no quarantine tank, or maybe it was using the old API products and not realizing that my water conditions were bad (I was using strips and ammonia kit). Either way, I am moving on to setting my 37 gallon up as a quarantine tank and have bought two 55 gallon tank set ups. I have artificial aquarium plants and decorations for my 37 gallon. I disposed of my old sand. I have soaked everything in vinegar and hot water followed by rinsing thoroughly with hot water in an attempt to sterilize everything. I plan on using all of that in my 37 gallon quarantine tank. I am debating using gravel or sand as my substrate in the quarantine tank. What do you all think? Also, what do you think of the tank decorations in there as well? My thoughts are that putting fish in an empty tank qould cause more stress. Will all of the fake plants and decorations do well if dosed with paraguard or any othe potential meds? Tenatively I am planning on stocking one 55 gallon with Blood Parrot Cichlids, Loaches or Corycats and Cardinal Tetras. The other tank I havent decided yet! Any helpful suggestions or tips for me? Please be nice, I am by no means a pro here.