I’ve been keeping seahorses for years and have lost two relatively young seahorses (maybe 18 months old) in the last month. I keep horses with just a few soft corals plus a mandarin and clown fish. Set up is a 120 g tank, uv sterilizer, sump, filters, decent flow on the low end, etc. I’ve had short term success keeping several at a time…the horses live/eat/mate actively.…but this is a recurring theme. They appear healthy and active and die without a trace of illness at 12-24 months…..I wonder what experience other seahorse keepers have had with seahorses…how long your’s have lived in captivity, bacterial or other kinds of diseases, etc?