Thanks guys. I'm really pleased you all seem to like the hardscape as much as I do. Of course, I should be happy, as long as I like it, but the sense of approval is reassuring, so thank you. 🙂
Viktor - thanks for such in-depth feedback mate. To hear comments like that from a pro like you fills me with confidence. If I'm honest after an 8 month break it has taken a while to get back the creative juices, but I think they're flowing ok now.
Later this week I will put in my plant order, still TBD. I anticipate planting by the end of the month.
I will be using RO. I've used hard tap water with success for years but my last couple of scapes used RO, and I think my plants had an 'easier' time with it. I'll likely be stocking tetras too, so they prefer it softer. Another bonus is no limescale build up on the glass due to evaporation.