Hi everyone..I am new here and apologise if this has been answered before but my 2/3 year old clown loach is not well and I am worried. It would seem my old heater was over heating for some time and the water very warm.When I replaced the heater the water temp dropped..to 77 degrees..since then three penguin fish died the forst day and now my clown loach has been laying on its side and gasping, not eating that I can see. Local aquarium shop said to rais ethe temp to 85 degrees and use Myxazin once daily in tank for 5 days..I did a 40% water change prior to this. I am concerned as dont like to see living things suffereing.Can you help please?