DIY shower cleaner with phosphoric acid

DIY shower cleaner with phosphoric acid

I use Ranex Rustbuster as a rust converter as it has a high concentration of phosphoric acid. Can you please see the link to its MSDS and recommend how I should make up a dilute solution to use as a shower cleaner.
http://www.bondall.com/wp-content/uploads/HXR67-RANEX-RUST-BUSTER.pdf

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Dr Chemical

You can use it as concentrated as you want. Phosphoric acid is a weak acid – Coke contains 5% phosphoric acid – that’s how it cleans coins.

Anonymous
Anonymous

Great thanks.

Anonymous
Anonymous

Can I use this with a septic system?