i have to add marine sand to my 55 gallon so my peacock dosent cut himself (marine sand all my petco sells) and when i do the ph will go up as i have heard. once it does, will it go up to a dangerous rate for my freshwater fish? or will they be fine? if it does turn out to be dangerous, how do lower the ph for GOOD?
thanks in advance
thanks in advance

ill try to get some pics of it