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We just bought our first spa in a box last night. Set it up, filled it up with well water. We live in the middle of nowhere. This morning, the water is rusty colored. We knew this was going to happen. My question is, can Iron Out be used or will it destroy the material? It only holds 240 gallons of water, so the amount would be an extreme minimum. Any help and/or advice is greatly appreciated. Thank you all in advance.

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Here's the safety data sheet... looks like the ingredients are used as food grade chemicals by themselves, although sodium sulfite is said to be a dechlorinating agent, and the hazards of Iron Out list that contact with acids liberates toxic gas, or it can cause serious eye damage. Also it says this product may react with strong oxidizing agents, and spa chemicals tend to be oxidizing agents. Conditions to avoid: Do not mix with other chemicals. Incompatible materials: Strong oxidizing agents. Combustible material. The makers of Iron Out say not to use any similar products with hydrofluoric acid for this purpose either.

 

Here's some info on the chemical compatability of polyethylene (what inflatable tubs are made of),  along with a chemical resistance chart, which says "oxidizers are the only group of materials capable of chemically degrading polyethylene. The effects on the polyethylene may be gradual even for strong oxidizers and short-term effects may not be measurable. However, if continuous long-term exposure is intended, the chemical effects should be checked regularly".

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FYI, They sell a camping water filter at Walmart for under $20 that you can attach to your garden hose and will filter the water before it gets in your tub.

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