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DIY - Muriatic Acid Dispenser

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sergey:
Hello All
I've got a swim spa from Arctic Spas - So far happy but :
My HP level is rising too quickly and I can add acid only every 2 weeks. (it is too high on day 4 already)
So, I have an idea to design and build a small acid floating Dispenser. (wi-fi)
Would like to know if it is a stupid idea or not - Feel free to express your opinion.
Thank you !
Design could be like this  : https://drive.google.com/file/d/1kts6qKq9Eakf-xpd7mBVbWxlYzgP1kxo/view?usp=sharing

Tman122:
I would worry about concentrated acid getting on stuff (shell, filter housing, ect.) as the floater settles where the current takes it. I always dilute muriatic acid in 5 gallons of water before adding it to the tub. And I pour it in the center carefully.

Tman122:

--- Quote from: Tman122 on December 03, 2019, 07:03:01 pm ---I would worry about concentrated acid getting on stuff (shell, filter housing, ect.) as the floater settles where the current takes it. I always dilute muriatic acid in 5 gallons of water before adding it to the tub. And I pour it in the center carefully.

--- End quote ---

In other words scoop a bucket of water out of the tub, mix and return.

sergey:
Yes - I thought about that but :
1. battery operated dosing pump will supply a very small amount - let say 1 ml per minute. (if it is still an issue it can be showered down more - let say drop by drop)
2. the acid output hose could be ended with a small plastic perforated container  where acid will mix with water a bit before entering the spa without touching anything but this container directly.
3. As I understand M.acid does not really react with (damage) plastic - Am I wrong ?

here is a newer picture : https://drive.google.com/file/d/1AXLD1mgj5ZmFcm6BCxdAsF3LbFnWlZ0C/view?usp=sharing

Tman122:
When you float something in you spa where does it end up in a day or two?

Lets talk about why your PH goes high so much so quickly. What are you using to sanitize and how?

You said you can only get to it every couple weeks? Do you only use it every couple weeks?

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