got to the aquarium shop and the guy advised me to double dose my tank with esha 2000 and to put voogle tonic into the tank also. I lost one more fish, golden alge eater. I don't see the harlequin that I posted the photo of so I don't know if it has died or is simply hiding away. I have disenfected my bucket jug and net in the esha 2000 also. is there anything anything else I should do?