Is this considered a sequestrant?

This product is considered a sequestering agent, yes. It prevents the formation of scale on your spa's shell and equipment.

What color is the solution supposed to be? My first bottle I bought was a light blue however the new bottle I got is almost a red rust color.

Like an opaque brown. Previous packaging for this packaging had been partially see-through, so it may have been dyed blue for a better look before, but now the plastic blocks all views so the color can be natural.

What are the actual ingredients in this product? Stain and Scale Control?

The active ingredients are primarily acids. Including phosphoric acid, etidronic acid, and Butenedioic. These are at least the dangerous chems listed on the MSDS sheet. The bottle simply reads "multiple active ingredients." It's safe to use in your pool as directed, but don't drink it or get it in your eyes. If it gets on your skin, minor irritation may occur if not washed off as soon as possible.

how often should this be used?

I have used 2 oz a week in a 375 tub for over 20 years...last tub lasted 19 years

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Description

🛁 Elevate your spa game—because your relaxation deserves the best!

SPA SYSTEM SAVIOR - Protects your spa’s circulation system from damaging scale deposits.
METAL STAIN ERASER - Effectively removes fresh metal stains to maintain pristine spa surfaces.
TRUSTED BY THOUSANDS - Rated 4.6 stars by nearly 2,000 spa enthusiasts who refuse to settle for less.
EFFORTLESS WEEKLY CARE - Just add once a week for continuous stain and scale defense.
CRYSTAL CLEAR EVERY TIME - Keeps your spa water sparkling by preventing calcium scale buildup.

SpaGuard Spa Stain & Scale Control is a powerful liquid formula designed to prevent calcium scale buildup and remove fresh metal stains, protecting both your spa surfaces and circulation system. Easy to use with weekly dosing, it ensures crystal-clear water and long-lasting spa health, trusted by thousands of users.

Specifications

ASIN	B006MHSE26
Customer Reviews	4.6 4.6 out of 5 stars (1,998)
Date First Available	17 September 2014
Item display height	9.5 inches
Item display length	3 inches
Item display weight	3.77 kg
Item display width	3 inches
Item model number	BIO42356
Item volume	946 Milliliters
Manufacturer	BioLab
Material type	Metal
Part number	BIO42356
Power source type	manual
Product Dimensions	15.24 x 5.08 x 5.08 cm; 907.18 g

Reviews

T**N

Working well, have no stains or any buildup. We are are well water. Slightly hard water.

14.12.2025

B**R

Good product and fair price

20.01.2026

A**E

I am giving it four stars, because of price. At $28+, the price is quite high. There are competing products here which are significantly less expensive for 32 fluid ounces, less than half. But I know it works, have used it now for two hot tubs. The problem with trying a competing product in order to save $10-12, the experiment could end in disaster for your water quality. More work for you, than 10 bucks could be worth. So I guess I just grin and bear it. I was priced around $22,, three years, ago. Like everything else, prices reach for the five stars, but I give only four....

13.04.2025

E**C

Very convenient to use and great delivery time.

28.05.2025

B**E

Exactly what I ordered

21.07.2025

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