Alright just got confused, do you mean you are tanking tank water out, treating it with Water Conditioner, then putting it back in? I think I might have just misread that. I think as long as the water is new, either from faucet or other source as long as it has Water Conditioner added it should be fine. Not familiar with AlgaeCure I try to add as few things to my tank as possible, but certainly if you have an algae problem it shouldn't hurt. If algae is a problem try some live plants. I had some algae growth and bought some hornwort which is just a low light easy to care for plant(since I can pretty much kill plants just by looking at them) and algae is gone completely within about a week and a half time. My fish love it, competes with algae, and also sucks up some of those nasty nitrates, and in my case even with regular lighting is growing like a weed.
Far as the listing at the bottom that is a signature. Go to your profile, under Modify Profile click on Forum Profile Information, space for signature is at bottom. Just fill it in and it will be right there on the post.
Durn! sick molly at home

, guess I am headed that way. Hope this all helps.