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Oh, that's a bit better than what I imagined. I never seen brown algae appear in little circles like that before.. Uhm, no, it's not a new tank, roughly 5 years old. Thank you so much for replying

Hi everyone, I spotted some round patches of dark (dark brown, blackish?) on the usual green algae I let grow on the back surface of my fish tank (fresh water, only platies and some plants). So, I don't clean the back surface of the tank off of the green algae, and I would like to show you what...

Thank you for your very detailed answer, Colin! very much appreciate it!

Thank you, I am sure a little won't hurt, I'll try

Hi everyone, I have a platy tank, established a few years ago, haven't added a new fish to the tank for about.. 9 months? I noticed today that one of my female platies had this strange, transparent poo hanging out - pictures attached. My first hunch was some kind of parasite, but I am not a 100%...

Hello, Can anyone recognise which sickness is hurting my platy tank? I have an idea, but I am not sure. Basically out of the blue (no new fish added, no change in diet, but doing weekly water changes), quite a few of my platies started having light patches on their bodies -at first i thought it...