G'day Madmerv,
Thanks for your reply. Here is a shot of the stuff I have now. Taken on my phone so the quality is definitely LQ. The only thing missing is the benibachi bee max but that is in the fridge till needed. I would love Seiryu stone but have read that it would raise the pH and hardness. I will be using RO/DI and adding GH+ so it may be possible to use less GH+ to get the pH to around 6-6.2. I am aiming for about 150 TDS. I am now looking at black+white agate but think this may have a similar issue. Another option may be slate. Don't fancy Dragon or Manten stone, although I may have to go down that route if I must have stone. The best option would be no stone but I want to use it to add false perspective, if at all possible with only 12" front to back.
Mark.