About ready to fill my pool full of dirt!!!!

[BigDave]

I have no other guess about the TA. My guess ( and the reason I've advised you to bring the pool to shock level ) is that your FC got too low, an algea bloom started and you haven't gotten enough bleach in there to kill it. How's the pressure on you filter? Rising?

[True Blue]

I'll second the advice NOT to put algaecide in. I did that last year (before I found this forum) and I had a foamy, frothy mess! That and it didn't help kill the algae that was already present.

[PBLsQuad450]

What does "the filter's not filtering right" mean more specifically? by "pump" I suspect you mean filter since the pump pulls water through the sand, and I don't mean to be snarky, just couldn't make out the post. The pump/motor wouldn't need new sand. Nor should the filter in my experience? I have had 2 sand filters in my 30ish years of pool maintenance responsibilities and have never added or replaced sand. And I backwash often. Once a week at dead minimum. I suspect husband has shot you in the foot. Don't add anything but bleach right now, unless your ph goes to like 7, in my opinion. Get .5 to clearly 0. Just like Big Dave suggests. It looks like you may have gone low on Cl given your CYA level and had a bloom start, thus the cloudy water. Unless something really weird happened, I don't think the filter intervention did anything but give the algae the upper hand. Again, what does "clean it all" mean? Look, chlorine is literally an "antibiotic" and .5 of an infection is still an infection. Think like the doc tells you, take it all exactly as directed and take the full
course! You want to clean it all? I super shock my pool to 50ppm. No need to take it apart, just run Z Pack through it.

Good luck!