I has bought use Hanna marine phosphorus ULR HI 376.
I has a hard time understand the reading.
I have a 20 gal tank in the office and yes use tap water. :smash::smash:
always get reading over 200 mean over range. I have switch over using distilled water.
still getting the same number. what...
I agrees with marrone is a big jobs and your need four people to help you move the tank around. but can be done. you also need to clap the tank together so the seam do not move when you re-silicone and let it set.
I did on my 50g once. is hard, you need to remove one seal line and reseal. let it dry and restart on the next. if you have no way to brace the tank from remove all the seal at one.