I am having a phosphate problem! Which in turn has caused a BAD diatom problem in my tank! I use tap water and that is where it is coming from but I do NOT have the money for an RO/DI unit or to get a reactor. Someone suggested getting one of those 5gal juggs that you can get from a store and then just bringing it up to temperature and using that for water changes instead. I can get those refilled for like $5. Does anyone have experience doing so? Will this actually work? And when i do my first water change what percentage should I do? Just a normal 20%?