Natural Swimming Pools

10/18/2026

Day 1 Cold Plunging. Water temp 67.9. Spoiler-I only last 45 seconds submerged. Goal is two minutes every day!

10/17/2026

Week 1: Our natural swimming pool is turning GREEN. 🌿👀

And no, we’re not adding chlorine.

We’re starting up a concrete pool conversion in Gilbert, Arizona, using BioNova’s BF4 Biofilm Reactor.

Right now, the biofilter’s microbiome is developing. The initial biofilm needs approximately 10–14 days to mature, followed by another 7–10 days for the algae to die back and water clarity to return as the system develops.

The goal? Biocenosis: a balanced, functioning biological community.

We’ll be back every week to document the transformation. The same process has played out in our own natural swimming pool, and now we’re showing you this one, step by step.

Would you trust the process—or would you be reaching for the chlorine? 👇

Message us DESIGN to start on your NSP today!

10/16/2026

10/13/2026

10/12/2026

Day 1: Converting another chlorine-free swimming pool in Arizona. 🌿💧

This 663-square-foot concrete pool in Gilbert is officially becoming a BioPool!

Instead of relying on traditional chemical sanitization, we’re using BioNova’s BF4 Biofilm Reactor to biologically filter the water.

Here’s what’s powering it:

🪨 27,000 lbs of gravel inside a 5’ × 18’ biofilter
💧 100+ gallons per minute circulating 24/7
🦠 A living biofilm ecosystem that develops inside the filter

But here’s the part most people don’t realize: the water won’t necessarily be crystal clear on Day 1.

It takes approximately 10–14 days for the initial biofilm to develop, followed by another 7–10 days for the water to clear as the system matures.

And the first year? That’s when the biofilter continues to season and establish itself. After dust storms or heavy rain, temporary cloudiness can occur while the ecosystem matures.

We’ll be back every week to document the progress—from startup to clear, swimmable water.

Can biology do the job without chlorine? Follow along and watch this pool come to life. 👀

📍 Gilbert, Arizona
🌿 Natural Swimming Pools LLC
💧 Water You Can Trust.

10/11/2026

Day 1 starting up our natural swimming pool conversion in Gilbert, AZ.

10/10/2026

Biopool conversion is ready for start-up! Four backwashes are the most we’ve done on an initial start-up on a biofilm reactor. No matter how much we backwash, there is always going to be dirt and fines leftover for the biofilm reactor to finish eating through in the first year and 4 seasons. It will take 10-14 days for the initial biofilm to go through 5 stages of maturation. Then algae will die off after 7-10 days after the biofilm has matured.

10/09/2026

Day 181 not putting any chlorine or chemicals inside my natural swimming pool 🏊‍♂️ 🌱 💦

10/08/2026

Day 180 — How much maintenance does an NSP need? No chemical testing. No water balancing. No chemicals. The haters think we brush every day. The video proof shows us brushing every 10 days on average. Would you brush it yourself each week? Or hire a pool pro? Or buy a robotic cleaner? Or a combo?👇

10/07/2026

Gilbert biopool conversion initial backwash and start-up. After 3-4 backwashed, the gravel will be clean enough to start growing biofilm where healthy organisms and bacteria will consume all the nutrients in the water.