I started with over 250 TA and I add the same way, so far no holes. lol Just pour it in front of the jet close to the surface of the water and be careful not to splash it. I generally only add around a quart at a time to my 18 foot round, that seems to drop it to 7.2ish so I can aereate it back up. Looks like you may just have to get a new wardrobe.