My pool is 16í x 32í with a deep end (approximately 20,000 gals.). I have been using Samís Club Sanitizer-Shock-Stabilizer (Dichloro-s-triazenetrione-hydrated) for shock every week. I also use this for chlorine by adding about one cup every 2 or 3 days. Would I be better off using Samís Tablets (trichloro-s-triazinetrion)? The tablets are much more expensive than the shock.