I started a year ago with 5 platies and a betta, I knew nothing. Got a 10gal tank put in tetra safe start and promptly found the least educated person at Petco. Petco person answers all my questions and sales me 5 platys and a betta. Over the next two months or so all but one male and one female die. Male platy aka Fish One was always into female platy, Fish Two, even when there were other platies in the tank. I got another female platy because Fish One would never leave Fish Two alone. I also got another betta. Second female platy died one day which left Fish One, Fish Two and Fiddlesticks as tank mates for the next eight months with no events. A couple months ago Fish Two gave birth to 4 fry and all survived in tank, about a month later 4 more! Fiddlesticks is very unhappy. I got a 20gal set it up and started a fishless cycle. Cycling takes forever but I didn’t want to kill anymore fish so we waited. About 3 weeks ago Fish Two developed Dropsy I tried to treat her but she never got to see the new tank. Yesterday I moved Fish One and all 5 of his fishy daughters to the 20. Even while Fish Two was sick Fish One would just be wherever she was and would warn her when now grumpy Fiddlesticks was near. Here’s where I need advice. Fish One is spastic in the new tank. Only swimming quickly up and down the walls or hiding deep in rock formations. How do I help him? The other fish, tho juveniles, stay in a school most of the time but he just completely ignores them and paces the tank or hides.