Only a litre? Gee, I definatly wouldn't keep them in there permanently. Is 2.5 enough? That sounds perfect for my needs a list of what you used would be great please getting dad involved could be hard, I will try though, I am terrible at diy so I will need some help. He got really angry about dividing my 2 foot, I'm still not sure why, I was trying to comply with his limit of 3 tanks. Anyway, as long as he does the sawing, drilling ect. I should be fine, I'm better at fiddly things, espicially when I'm not tired and a take very frequent breaks. Thanks :)