These are the relevant products I've been using:
* Seachem Neutral Regulator - which does NOT help my pH at all
* API Proper pH 7.0 - which neutralizes the pH to 7, but it rises back up to around 8 in a matter of hours
* Top Fin Water Clarifier - which helped at first, but is no longer effective (and the bottle says to "seek aquarium specialist if it doesn't work after 2 treatments")
As of right now, I have 3 danios and one serpae tetra. I have changed the water regularly (roughly twice a week now) and instead of tap water, I've been using bottled spring water after dechlorinating (just a precaution). I've even changed 50% of the water TWICE now to help with my pH and cloudy water issues. The employees as Petsmart aren't giving me the helpful advice to fix the issues.