This customer reached out because their pool heater was no longer working. It turned out to be that the pool water was very corrosive, and the inside of the heater had completely rusted out. As you can see from the photos based on the water parameters, this water was in very bad shape. We replaced the heater. We also drained the pool to get the chemicals back in balance.

Sta-Rite Max-E-Therm 333 pool heater on a concrete pad with pipes and control boxes nearby.
A Sta-Rite pool pump heater with control panel, placed outdoors on gravel.
Pool heater with pipes and fittings, adjacent toolbox and gravel background.
A hand holding a metallic corroded pipe on a truck bed
Corroded vehicle part with multiple round openings, possibly an engine or exhaust component, on a truck bed.
Close-up of a rusted metal surface with multiple round openings and bolts, showing signs of corrosion and wear, possibly part of industrial machinery or equipment.
Pool heater unit outdoors on concrete slab with pipes and electrical connections against a block wall.
Swimming pool equipment, including a filter, heater, and control panel, situated outdoors on a concrete slab with gravel around it.
Jandy pool heater on a concrete pad with surrounding tools and equipment, including cables and a hose on a gravel surface.
Digital water testing device showing results for FCL, TCL, CCL, pH, ALK, HARD, CYA, COPPER, IRON, and PHOS.
Digital salt meter displaying 5400 ppm NaCl and temperature at 57.9°F, labeled "SaltDip Pro" with control buttons.
Orenda app screenshot displaying water chemistry adjustments for pool balance, including temperature, pH, alkalinity, calcium, CYA, TDS/salt, LSI, chlorine, and phosphate. Pool volume is 13,460 gallons.

This is From the heater that was replaced. As you can see the water coming out is in pretty bad shape. This should not look like you are draining motor oil from your car.