yeah every other day i change it im got let the amonia build a little to get them use to it if u know what i mean. i pore them in to a net in the main tank empty the water out wash the bottle in hot water only, then fill it with water from the tank, throw the little ####s back in hehe
i feed them little and often at this stage 3-6 times a day if i can fit it in but only minute amounts so there is not stail left overs.
but i strongly believe that if you force a heavy sence of amonia at a young age they with be less saseptable to it get them when there young as they say lol