Ianab;1412109; said:Vinegar is just acetic acid, it's safe and useful for cleaning because when it's concentrated it will kill most micro-organisms, but once it's dilute it's pretty harmless. Thats why it's used for making pickles are things. Worst thing a few leftover drops will do in the tank is drop your pH a fraction.
Best sort to use, the cheapest. You aren't worried about the flavour or whether it's made from rice or apples.
Cheers
Ian
brcacti;1413965; said:I saw on a food site, if I remember right regular vinegar is slightly acid while apple cider vinegar is neutral or slightly alkaline.