Hallo everyone! Last fall I got 4 Fundulopanchax sjoestedti - the avatar picture shows one of the 2 males. One of the females had a swollen eye. In the half year behind us almost all of them have shown recurring signs of exophtalmia/popeye. Each time they seemed to overcome the condition with ease. Last Christmas friends gave me their old 13 USgal tank. It houses a Blue Gularis male with one dim eye - I am confident that also this time it will pass, with or without the help of medicine. I intend to order a pair of small Tanganyikan cichlids for the 13 gal and to move the eye patient to another aquarium. How do I disinfect the tank? - I generally merely rinse my smaller tanks under the faucet, rubbing off the algae with kitchen paper. - Is it safe to use a liquid product meant for washing dishes? - To rinse I have only cold water. + I am afraid to leave poisonous residues in the tank. I think this is even more likely because this 13gal is too large to lift and rinse under the faucet, which for the smaller tanks is always a bit risky anyway. Last time I banged a tank - fortunately only with minor damage. Thanks in advance for any practical advice!