the sword tail i have was rather nasti to the other 1!
yep, ill bag them up once i get fish bags and take em bak!
Male swordtails are generally pretty peaceful except towards each other, its best to only have one male maximum to a group of at least 2-3 female swordtails.
Mollys aren't so bad, you can keep them in all male groups (if the group is large enough i.e. preferably at least 5males) or in mixed gender groups (at least 2-3females per male)- both female swordtails and female mollys do fine in all-female groups. Swordtails and mollys are sociable fish so its good to have at least a trio of each.
Red tailed black sharks can be agressive towards fish like mollys and swordtails though depending on their colouring/pattern. RTBS in the wild are very territorial/agressive towards their own kind and will attack any other RTBS that stray into their territory, these fish are not the brightest of fish sometimes and will sometimes attack any other type of fish that looks shark-shaped or has similar colouring/aptterning to an RTBS. So although you can keep livebearers like mollys, swordtails, guppys, platys etc with red tailed black sharks, you need to choose the colours/patterning of the fish you get as tank mates to the RTBS very carefully to help prevent any conflict between the RTBS and other fish in the tank- livebearers like mollys, swordtails, guppys, platys etc come in a wide range of colours and patterns (particularly guppys, which come in pretty much every colour of the rainbow).
see its because i know nothing of real plants, so how would i go about addin real plants to my tank and not completely mess things up? how would i maintain then etc
Hm i'm no expert on plants, but there are a lot of hardy live plants available in the hobby which require no special care, the planted tank section of the forum has loads of info on plants and i'm sure there will be many people there able to recommend you some suitable easy to look after plants for your tank
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