When opening an inground pool, the right chemical start-up kit saves time, reduces guesswork, and helps you swim sooner. This guide highlights five top options designed for inground pools, from small to large water volumes, with clear guidance on who each kit is best for and why. Whether you’re balancing after winter or shielding your water from mineral buildup, these kits streamline the process and support crystal-clear results.
The following table summarizes the five featured products to help you compare at a glance.
| Product | Best For | Pool Size Range | Key Feature |
|---|---|---|---|
| In The Swim Pool Super Opening Chemical Start Up Kit | Large inground pools up to 35,000 gallons | Up to 35,000 gal | Pre-measured packets for quick opening |
| In The Swim Pool Deluxe Opening Chemical Start Up Kit | Mid-size pools up to 15,000 gal | Up to 15,000 gal | Two bags of dichlor plus clarifier |
| In The Swim Pool Basic Opening Chemical Start Up Kit | All-season value for small-to-mid pools | Up to 7,500 gal | Single dichlor bag with clarifier |
| MAV AquaDoc Pool Starter Kit | All pools up to 20,000 gal; versatile for salt water | 15,000–20,000 gal | Includes algaecide, clarifier, shock, test strips |
| Doheny’s Ultimate Pool Opening Start-Up Kit | Legacy American-made option for mid-to-large pools | 10,000–30,000 gal | Metal Out, clarifier, premium shock, test strips |
In The Swim Pool Super Opening Chemical Start Up Kit
This kit is designed for fast, reliable opening of large inground pools. It includes four bags of 99% sodium dichlor to quickly establish safe, swim-ready water and a clarifier to keep the water crystal clear as your filter works. It’s best for big pools where you want a straightforward, pre-measured start-up routine that minimizes measurements and guesswork.
Who this is best for: Pool owners with large inground systems (up to 35,000 gallons) who want a quick, no-fuss opening with predictable chemical levels. Better for those who prioritize speed and simplicity over a broader balance set beyond the basics. Limitations: Uses a higher concentration dichlor approach, which may require ongoing pH management after opening.
In The Swim Pool Deluxe Opening Chemical Start Up Kit
This kit targets mid-sized openings with two bags of 99% sodium dichlor. The inclusion of a clarifier aids filtration by coagulating dirt, making the filter more efficient as you begin the season. It’s a strong choice for users seeking a balanced start that reduces ongoing chemical guesswork while providing reliable clarity.
Who this is best for: Pool owners with mid-range volumes who want a combined opening and ongoing season value. Better for those who want a clear water baseline upfront. Limitations: More limited to the 15,000- gallon range, not ideal for very large ingrounds without adjusting quantities long-term.
In The Swim Pool Basic Opening Chemical Start Up Kit
Focused on value, this kit includes a single bag of sodium dichlor and a clarifier to help your water stay clear as you ramp up proper pool balance. It suits smaller inground pools or those who want to begin with essential components before adding more as the season progresses.
Who this is best for: First-time pool owners or those with smaller volumes who want a simple, low-cost opener. Better for starter seasons or budgets where you want to add more products later. Limitations: May require additional algaecide, shock, or pH balancing solutions as you progress through opening week.
MAV AquaDoc Pool Starter Kit
This complete starter kit is designed for both inground and above-ground pools up to 20,000 gallons, including algaecide, a clarifier, shock, stain and scale remover, and test strips. It’s a versatile option for mixed sanitizing systems and salt-water setups, aiming to remove winter residue and provide robust opening chemistry.
Who this is best for: Pool owners who want a broad, all-in-one starter set capable of handling different sanitizing systems. Better for those who value a test-strip included approach for quick verification. Limitations: Suitable up to 20,000 gallons; larger pools may require scaling up or additional products.
Doheny’s Ultimate Pool Opening Start-Up Kit
Designed in the United States, this kit combines stain, rust and scale prevention with water clarifier and a premium shock. It also includes a free 10-pack of test strips, delivering a wholesome opening package for mid-to-large pools (10,000–30,000 gallons).
Who this is best for: American-made reliability with a comprehensive opening routine. Better for pools requiring anti-scale and rust prevention from the outset. Limitations: Focuses on a broad set; ensure it matches your pool’s exact gallon capacity to avoid under- or over-treatment.
Buying Guide: Pool Opening Kit Considerations
Key questions to help choose the right kit:
- What is my pool’s water volume and type (in-ground, vinyl, salt water)?
- Do I prefer a pre-measured kit to minimize steps, or a flexible kit I can mix and match?
- Should I prioritize algaecide, clarifier, or metal/stain control in my opening routine?
- Is a test-strip kit included, or will I need separate testing supplies?
- Are there any compatibility needs with existing sanitizers or salt systems?
Practical guidance for choosing between kits:
- Choose this if you have a large pool and want the fastest start: In The Swim Super Opening Kit offers multiple pre-measured packets that simplify the opening sequence for bigger volumes.
- Choose this if you want all-in-one versatility: MAV AquaDoc is designed for inground and above-ground pools up to 20,000 gal and includes multiple essentials, including test strips.
- Choose this if you’re budget-conscious and opening a small pool: In The Swim Basic Opening Kit provides essential chemicals at a lower cost, suitable for smaller volumes.
- Choose this if you value rust and scale prevention: Doheny’s Ultimate Kit includes Metal Out and a comprehensive set of opening chemicals with a free test-strip pack.
FAQ
- What size opening kit do I need for my inground pool?
Answer: It depends on your pool’s gallons. Kits labeled for higher gallons are best for larger pools; smaller kits fit pools under about 7,500 gallons. - Do these kits include everything for opening and starting the season?
Answer: Most kits include essential items such as dichlor, clarifier, algaecide, and shock, plus some offer test strips or stain-control aids. - Is a salt-water pool compatible with opening kits?
Answer: Many kits are designed for both standard chlorine and salt-water systems; verify compatibility with the product details. - How soon should I add algaecide after opening?
Answer: Begin with the opening steps, then add algaecide as directed by the kit to prevent early algae growth. - Should I supplement these kits with pH balancers?
Answer: Yes. Most openings require pH and total alkalinity adjustments after the initial shock and clarifier steps. - Can I mix products from different kits?
Answer: It’s generally better to use one kit for consistency, or carefully follow labels if combining products from different kits.