Hi, I will be going on vacation for a little over 3 weeks and don’t know if my fish will survive. We bought them an automatic feeder, but I’m not sure if it would last long enough. It feeds up to 14 meals and I don’t know how many meals it feeds each day, but it says up to 4. My fish should survive through without water changes. I once went a month without water changes (Not on purpose, was very busy) and no fish died. I also add tetra easy balance plus, which says reduces water changes. I don’t know if not dosing over vacation will affect that. Before I leave I’m also going to do a bigger than normal water change. My tank has platies and swordtails in it but no real plants. Also, my light is not automatic so they’d be left in the dark most of the time, but there is two windows nearby so they may get light, but not a lot, so no algae will be growing for them to eat. Any suggestions on how I could keep my fish alive over vacation?