Hi Awibrandy,
When I started my 29G tank up I filled it with tap water and added salt and a powerhead to let it mix up. After the 2 months I started using distilled water from whole foods. I did that for another couple of months and then got tired of lugging 10 gallons a week up to my aparment so I purchased RODI unit on ebay.
I dont run phosban, just a skimmer and a fluval canister with carbon which I clean every week and change the carbon every 2 weeks. I do a 5 gallon water change every sat/sunday. I dont have a heavy bioload in my tank, just 2 clowns, 1 firefish, 1 watchman goby, and I have a relatively large sump/tank ratio. I guess all of that helps keep things in check.
Guess I got lucky. I have never had a problem with algea growth or phosphates....knock on wood