My dad tested the water today in his 65 gallon tank he said it was as high as the kit could read, probably around 200 PPM. We can only do 18 gallon changes at a time with a 5 gallon bucket, what other things can we do, i remember reading about vodka dosing to lower them fast? could that be a possibility if any ones got a link to do so? And any other help is great, thanks.

btw all other tests were prefect, we running a redsea skimmer and phosphate reactor and a hob filter with carbon.