Ok Bioguard Silk sticks ingredients were Trichloro 95.05%, Other ingredients 5.95% Available chlorine 84.65&. I bought the Sams club PoolBrand Chlorine and its ingredients are Trichloro 99% and other ingredients 1% Available Chlorine 90%. All looks about the same. Ok I just read about the Cyanuric Acid, where do I get that at and how much do I use?? My pool is 16x30 inground pool, vinyl liner. WHen I say stabilized I just mean my chlorine and PH are in the normal levels. My CYA reading is 100. My bioguard shock is 1lb pound and its ingredients are Calcium Hypochlorite 57.8 % Other ingriedients 42.2 %. I put 2 bags in about every week. Says one bag per 10,000 gallons of water. I have about 17,500 gallons.