Low DoseCDC recommends 7-day for pregnancy & diabetes MonistatÂ® 7 Low Dose. 7 Day Treatment Plan. The original prescription formula offers lower dosage levels and treatment over 7 days. CDC recommends only a 7-day topical treatment for pregnant women and diabetics (consult a doctor before use).
First of all, borax (sodium tetraborate decahydrate) in water produces boric acid and raises the pH. So the studies on boron toxicity that refer to boric acid are absolutely relevant for Borax as well.
Rainwater is known to have acidic properties that can negatively affect your pool water chemistry balance. This can affect anything from the pH balance to alkalinity levels and more. The pH of rain across the US, which is all acid rain, is due to industrial gasses (i.e. NOx, SOx) which make nitric and sulfuric acid. Aside from rainwater falling directly into your pool being a bad thing, something even worse can happen.