Julie, liquid isn't for once per week. It vanishes in a day or 2. No wonder. No too swift.
If you want easy, call a pool store and get quote for a CL200 installed. They'll know what it is. Price will depend on plumbing.
If your filter is plumbed with room to spare, it's a 1/2 hr job. Edit- 1hr more like it.
I've maintained my pool for 20yrs. Never shocked it to where it smells. Trust me on this. I've been around pools 40yrs.
If you're going to drain & fill with dirt, wait till Jan or Feb. I'd have entire bottom jackhammered out, leave everything else, fill with florida soil & you'll have awesome screened in mango trees. No animals