MAV AquaDoc Pool Calcium Hardness Increaser — Calcium Chloride 10 lb bag, Fast-Dissolving Flakes for Chlorine & Salt Pools

MAV AquaDoc Pool Calcium Hardness Increaser is a fast-dissolving calcium chloride formula designed to raise and stabilize calcium hardness in swimming pools quickly and safely.

Keeping calcium hardness in the recommended range prevents corrosion of pool surfaces and equipment while helping water chemistry remain consistent. MAV AquaDoc’s 10 lb bag provides a measured, easy-to-use supply of calcium chloride flakes compatible with chlorine and saltwater systems. The product is made in the USA and formulated for both above-ground and inground pools to support long-term water balance and reduce maintenance headaches.

How quickly will this product change my pool’s calcium hardness?

Results are fast because the flakes dissolve readily when added to circulating water. You can expect measurable increases within minutes and normal circulation will distribute the calcium throughout the pool in about 15 minutes.

• Fast-dissolving calcium chloride flakes for swift action
• Works while circulation pump runs—no special equipment needed
• Ready-to-swim guideline: approximately 15 minutes after addition
• Adjust dosage based on pool volume and current hardness

How do I add AquaDoc Calcium Hardness Increaser to my pool safely?

Add the increaser with the pump and filter running to help the material disperse evenly. Broadcast the flakes across the deep end or dissolve them in a bucket of water first for extra caution, then pour around the perimeter while avoiding direct contact with vinyl liners.

• Run pool circulation before, during, and after application
• Use recommended dosing by pool volume and current hardness level
• Option to pre-dissolve in a bucket to reduce settling on surfaces
• Avoid adding directly to skimmer to prevent concentrated spots

What level should I maintain and how often should I test?

Target calcium hardness typically falls within a balanced range that protects surfaces and equipment without causing scale. Test water at least monthly and after large water additions or heavy use; adjust with the increaser when readings fall below recommended values.

• Typical target range: maintain within the pool industry’s recommended band
• Test monthly, after major top-offs, and after chemical shock treatments
• Use test strips or a reliable liquid kit for accurate readings
• Re-dose gradually to avoid overshooting desired hardness

Who is this for: MAV AquaDoc Pool Calcium Hardness Increaser is intended for pool owners, service technicians, and property managers who need a dependable, fast-acting solution to raise calcium hardness. It’s suitable for both inground and above-ground pools, compatible with chlorine and salt systems, and useful for seasonal maintenance, new pool fills, or ongoing water-balance programs. If you want a made-in-USA product that dissolves quickly and integrates into standard circulation routines, this 10 lb pack gives an efficient amount for routine corrections and periodic top-ups.