Natural Swimming Pools

10/26/2026

Your pool has a robot. Your pool guy comes every week. So why is there algae on the walls? 👀

First visit at this new saltwater pool:
🧪 Free chlorine: 0.00
🧂 Salt: 1,800 ppm — below this system’s 3,200 ppm target
⚙️ Salt-chlorine generator: DOWN
🦠 Algae and biofilm building up on the surfaces

Here’s what many pool owners don’t realize: a robotic cleaner doesn’t replace brushing, and a saltwater pool is still a chlorine pool.

The salt-chlorine generator produces chlorine. When it isn’t working and there’s no adequate chlorine residual, microorganisms can take advantage of the opportunity to grow.

And even when equipment is working, pool surfaces still need regular attention. Biofilm can attach to surfaces, and brushing helps disrupt that buildup.

We found other equipment and setup issues here, too. This pool needs more than a robot running around the bottom.

Question for homeowners: Does your pool service actually brush the walls and steps every visit—or do they just rely on the robot? 👇

10/26/2026

WEEK 2: The pool is getting GREEN… but we can still see the bottom. 👀🌿

Is the BioPool failing—or is the biology getting started?

This Gilbert, Arizona, conversion is developing its microbiome as the BioNova BF4 Biofilm Reactor matures.

🦠 10–14 days: The biofilm develops through five stages of maturation.

🌿 Another 7–10 days: As the biological system develops, we expect the single-cell algae to die back and the water clarity to return.

The goal? BIOCENOSIS — a balanced, functioning biological community.

We’re documenting the entire startup, including the stages most pool companies would rather not show you.

Would you trust the process? Follow along for Week 3. 💧

10/22/2026

10/22/2026

What are the downsides to a natural swimming pool?

10/21/2026

Want to design your natural swimming pool and see how we can fit a .de biofilter onto your new pool? Have an existing pool? We can add a biofilter into most pools and backyard spaces. Messages us DESIGN to start on yours today!

10/21/2026

Day 193 Living with a Natural Swimming Pool

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!