We are leaving for vacation from 8/1-8/6. I have found someone to come and feed the fish daily and siphon any obvious waste from the bottom of the tanks (no substrate) but when I have left this person responsible for water changes in the past, fish have pretty consistently become ill or died within a week (I'm not sure why but suspect temperature shock/poor acclimation or improper conditioner dosing) so I am hoping to avoid water changes during that time. My tentative plan is to do 100% water changes before leaving on 8/1 and another 100% change on 8/7 (we get in really late on 8/6). We have 2 fish, each in his own 2.5G heated tank. Will it be ok to let them go almost a week without a water change, considering that the solid waste will be removed on a daily basis? Open to other suggestions as well...
I forgot to mention, both fish are currently healthy and do not require any special care. Our typical water change schedule is 50% on Thursdays and 100% on Sundays. So I just did 50% today like usual and this coming week I am planning to alter to 100% on Sunday and 100% again on Wednesday, followed by 100% the following Tuesday. Hope that makes sense.