Hot Tub Serum Turbo Cashmere | Spa Water Softener

SKU: TU-030
$25.95

In stock

Pickup available at Leisure Time Inc. - Idaho Falls

Usually ready in 24 hours

View store information

Description

Hot Tub Serum Turbo CashmereĀ is a premiumĀ water softener and conditionerĀ that transforms how your spa water feels. Built onĀ borates, it gives the water a genuinelyĀ silky, cashmere-soft texture — the velvet feel of fine silk against your skin — while it soothes and moisturizes and takes the harsh edge off a soak.

Most water care products keep your waterĀ safe and balanced; Cashmere is about how the water actuallyĀ feels and treats you. It conditions the water so it's gentler on skin and eyes, leaves you feelingĀ soft and moisturizedĀ instead of dried out and itchy, and turns an ordinary soak into a more luxurious one. It's an especially welcome upgrade for anyone withĀ sensitive or dry skin.

The benefits go beyond comfort, too. BoratesĀ help buffer pHĀ so it drifts less,Ā reduce the need for other chemicals, and help guard againstĀ scale buildup — all from a product you add just once each time you refill.

Pro Tip:Ā Balance your water first. Get pH and total alkalinity into range before you add Cashmere, then dose it into already-balanced water. Starting balanced lets the borates do their softening and buffering job from day one instead of fighting water that's still drifting.

Brand

Hot Tub SerumĀ®

What's in the Box
  • 1 x Hot Tub Serum Turbo CashmereĀ (1.5 lb / 24 oz resealable container, granular)
Key Features
  • Silky-soft water — conditions the water to a cashmere-soft, silk-like feel
  • Softens and moisturizes skin — no more dry, itchy skin after a soak
  • Reduces irritation — gentler on skin and eyes
  • Buffers pH — borates help hold pH steady, so you adjust it less often
  • Prevents scale — helps protect surfaces and equipment from buildup
  • One dose per fill — a single application lasts the life of the water
How It Works

Turbo Cashmere introducesĀ boratesĀ (sodium tetraborate) into the water. Borates are prized as aĀ pH buffer — they resist the upward pH drift that hot, aerated spa water is prone to, so treated water holds its balance longer and needs fewer pH adjustments. That same chemistry gives the water itsĀ soft, conditioned feelĀ and helps reduce the eye and skin irritation that comes with water that's out of balance.

Because boratesĀ stay in the water, a single dose keeps working for the life of that fill — unlike weekly additives, you set it once when you refill and enjoy the effect until the next water change.

Pro Tip: Watch how much pH Up and pH Down you reach for after a Cashmere dose. Because borates buffer pH, most owners find they adjust pH far less often — that's the product quietly saving you time and chemicals between water changes, on top of the soft-water feel.

Directions for Use

Before use, adjust your water balance to the proper ranges:Ā pH 7.2–7.6,Ā total alkalinity 100–120 ppm, andĀ calcium hardness 150–250 ppm. Then add Cashmere directly to the water with the system in operation.

  1. Initial dose (each refill):Ā AddĀ 6 ounces (3/4 cup) per 200 gallonsĀ of water directly to the spa with the system running. This single dose lasts the life of the fill.
  2. Top-offs:Ā For hot tubs that need water added more than twice between complete drain-and-refills, addĀ 2 ounces (1/4 cup) per 200 gallons monthly.

Water treated with this product should not be discharged into lakes, streams, or ponds; disperse drained water evenly over the lawn or yard.

Pro Tip: Add Cashmere right after a fresh fill, once the water is balanced. Dosing at the start of a water-change cycle means you enjoy soft, conditioned water the entire time that fill is in the spa — and since one bottle treats about two full fills of a typical 400-gallon spa, you're set for the next couple of water changes.

Specifications
  • Brand:Ā Hot Tub Serum (Serum Watercare)
  • Part Number:Ā TU-030
  • Product Type:Ā Borate water softener / conditioner
  • Form:Ā Granular
  • Net Weight:Ā 1.5 lb (24 oz)
  • Active Ingredient:Ā Sodium tetraborate pentahydrate (90–100%)
  • Function:Ā Softens and conditions water; moisturizes skin; reduces irritation; buffers pH; helps prevent scale
  • Initial Dosage:Ā 6 oz (3/4 cup) per 200 gallons at each refill
  • Top-Up Dosage:Ā 2 oz (1/4 cup) per 200 gallons monthly, only if water is added more than twice between drains
  • Coverage:Ā Treats about two full fills of a typical 400-gallon spa
  • Longevity:Ā One application lasts the life of the fill
  • Water Balance Targets:Ā pH 7.2–7.6, TA 100–120 ppm, calcium hardness 150–250 ppm
  • Compatible Sanitizers:Ā Chlorine, bromine, mineral, and biguanide
  • Disposal Note:Ā Do not discharge treated water into lakes, streams, or ponds; disperse over lawn or yard
  • Application Note:Ā Balance water first; never mix with other products in the same container; add directly to spa water
  • Shipping:Ā Standard ground; not classified as a hazardous material
Compatibility

Hot Tub Serum Turbo Cashmere isĀ compatible with all sanitizing regimens — chlorine, bromine, mineral, and biguanide. Since it works as a conditioner rather than a sanitizer, it layers cleanly on top of your existing routine without changing how you sanitize.

It pairs naturally with yourĀ pH and alkalinity balancersĀ (used to get the water in range before dosing) and a reliableĀ test kit or strips. Think of it as the comfort-and-stability layer that sits alongside the products doing the sanitizing. Never mix it with other products in the same container; add it directly to the spa water.

Most products purchased from our online shop within the last 30 days are eligible for return. Please review our return policy to see the list of items that cannot be returned.

Some major items that are non-returnable:

  • Gift cards
  • Electronics
  • Pumps / Motors
  • Hot Tubs
  • Closeouts
  • Fireplaces
  • Electric Fireplaces
  • Massage Chairs
  • See return policy below for full list of non-returnables.

Hot Tub SerumĀ® Brand FAQs

What is Hot Tub Serum, and how is it different from other spa chemicals?

Hot Tub Serum is an EPA-registered water care line built around one idea most spa chemicals ignore: cleaning and protecting the inside of your spa's plumbing. Its products prevent and remove biofilm— the bacterial sludge that builds up in pipes and jets and keeps re-contaminating your water. Made by Serum Watercare, the line is registered with the EPA in all 50 states.

Does Hot Tub Serum replace my sanitizer?

No. Hot Tub Serum works along side your sanitizer, not instead of it. You still need to maintain an EPA-approved sanitizer (chlorine, bromine, salt, or a mineral system) at proper levels. Serum keeps your plumbing clean and makes your sanitizer more effective — so most owners end up using less of their other chemicals — but a sanitizer is always required.

What is biofilm, and why does it matter in a hot tub?

Biofilm is a slimy layer of bacteria that forms inside spa plumbing where you can't see or reach it. It protects the bacteria within it from your sanitizer, which is why an untreated spa can stay cloudy, smelly, or sanitizer-hungry no matter how carefully you dose. Because it hides in the pipes, it keeps coming back until it's addressed at the source — which is exactly what Hot Tub Serum targets.

How does the Hot Tub Serum Total Clean System work?

It's a simple two-step regimen. First,Total Cleanse is added before a drain-and-refill to purge existing biofilm and gunk out of the plumbing. Then, once the spa is refilled,Total Maintenance is added weekly to keep that biofilm from ever coming back. Purge to clean, maintain to keep it clean.

Is Hot Tub Serum compatible with my sanitizer system?

Yes. Hot Tub Serum is compatible with all sanitizing systems — chlorine, bromine, salt water generators, biguanide, and mineral systems such as The FrogĀ®, @easeĀ®, and Nature2Ā®. It's also unaffected by pH swings, cyanuric acid, and common oxidizers, so it keeps working even when your water chemistry drifts.

Is there a warranty benefit to using Hot Tub Serum?

Serum Watercare offers a Lifetime Jet Warranty for owners who use Total Maintenance weekly through an authorized dealer's auto-ship program. Because jet failure is often caused by scale and water-chemistry buildup that Serum helps prevent, the program covers replacement of removable jet inserts that fail due to water chemistry. Ask us about enrolling.

About Hot Tub SerumĀ®

Hot Tub Serum is a water care brand fromĀ Serum Watercare, built on a simple insight the rest of the industry overlooked: the biggest threat to clean hot tub water isn't in the water you can see — it's theĀ biofilm hidden inside your plumbing. Where conventional chemicals only treat the water in the shell, Serum's EPA-registered formulas clean and protect the pipes, jets, and internal surfaces where bacterial sludge takes hold.

The result is theĀ Total Clean System: a purge product (Total Cleanse) that scrubs existing biofilm out of the plumbing before a drain-and-refill, and a weekly maintenance product (Total Maintenance) that keeps it from ever returning. Registered with the EPA inĀ all 50 statesĀ and backed by a first-of-its-kindĀ Lifetime Jet WarrantyĀ for regular users, Hot Tub Serum is designed to make spa care simpler while protecting the equipment you've invested in — for water that stays clear, soft, and fresh with less work.