OK.

That's different. Immediate clouding after adding HTH is almost certainly calcium carbonate precipitation.

1. FIRST, make completely SURE that there is no feeder, mineral device or other chemical or treatment gadget or gizmo anywhere between the skimmer and the filter.

2. SECOND, make SURE that there is NOTHING the skimmer basket.

3. THIRD, add HTH directly to the skimmer, but in 1/4 the normal dose. Watch the pool return, to make sure there's no cloud going back into the pool from the HTH. So long as there's not, add the rest of your doses to the skimmer, 1/4 dose at a time, waiting at least 15 minutes between doses.

4. Watch the Taylor vids: http://pool9.net/tk-guide . When you get the kit, be careful to get an accurate TA and CH test result. Ignore the booklet and blue wheel.

Good luck!