Cranky Plattys/swordtail
 

Hello I have a 30 gallon tank i have a peacefull dojo loach, emerald corycat, pleco, catfish,and snail, As far as livebreeders I have a male black lyertail molly, female dalmatian salfin molly, female orange sailfin mollly, a male orange swordtail, and two male plattyes one red and black and one rainbow. here is my problem the swordtail and two plattys will not stop fighting, they follow each other around nipping and tormenting. i think there fighting over the orange female molly. ive try putting all three males in solitary confindment for hours and that just makes them not hurt each other super violently. what should i do?? and when my female swim vertically near them is she trying it mate with them?? the black and dalmatian are fine i think due to the fact there the same size. the other males are smaller.

recommended ratio for livebearers is 3 females to 1 male. thats your problem. i once tried to introduce a new male into my tank, but the co-existing male killed him, along with 3 others after that!

Thank you very much.:) What is the ratio for fish per gallon. is it a one gallon per inch?

no worries :) thats the general rule yes, but its the size of a fully grown fish that u have to take into consideration.