Need help getting started.. Old tank cleaning

This is the testament for reefers. This is AZdRat, he's the man when it comes to water! I'm not downplaying your other skills BTW...

I did exactly what he is warning you against, tap water. It was a nightmare and I had a tank pretty much crash... This hobby is best when advice that is sound is listened to and implemented. This doesn't mean you have to buy the most $$$ stuff, but you need to find ways of getting it done. Before I had my own RO/DI, I bought it from LFS, it was a lot of work, but it was worth it to get away from tap water. I ended up finding a used RO/DI for a good price and then replaced the filters and now I have more consistent water.