Hi Daniel, any updates to your Intex pool experiment? Glad I found you here, because I also thought the idea would be obvious and was wondering why there is not so much out there yet. I'm even thinking if it would work to put the regeneration zone inside the pool itself, e.g. fill large plastic buckets with gravel and stack them on top of each other kind of like stairs or put a whole IPC container inside. I don't need such a big swimming zone, so I thought that would kind of be the easiest way.