Re: A few clean up question and 1 wondering question
1- No it is not enough. Do weekly water changes of 25-40%. Vacuum some part of the tank each week.
2- When you do your water change, rinse the blue pad in tank water in a bucket. When the cart starts to degrade- usually in a few months, replace it.
3- Only if it falls apart.
4- Never if possible. If they get all crudded by algae, then you may want to clean them in a bleach dip. However, this will also kill the beneficial bacteria living on them.
I am curious what your water tests out at (ammonia, nitrites and nitrates) as that many fish in a tank being cycled can be an invitation to disaster.
Fish in the wild eat all kinds of things- microscopic organisms, fish eggs, bugs and their eggs, worms, algae, each other etc etc.
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