I have an old 55g which I was planning to use as a quarantine for the 120g seahorse display tank I am setting up. However, it recently occurred to me that this 55g would be overstocked if I tried to use it as a quarantine for 8 seahorses. My thinking was that I often see breeders overstock their grow out tanks with no problems because the environment is sterile and temporary, so it would probably be alright for me to have a slightly overstocked quarantine tank as long as I made sure to keep everything very clean, but I want to double check. Is it ok to use a 55g as a quarantine tank for 8 seahorses?