Currently awaiting a Rhinox 1000 diffuser from eBay (and one from a fellow forumite!), the diffuser I have now is way too big for this tank, I get 1 or 2 streams of large bubbles and not a mist. I will use the 2 Rhinox in rotation with one being soaked in a bleach solution whilst the other is in the tank.
The 4dkh water arrived from AE, I am running a fairly high bubble count to get to 30ppm, somewhere around 15bpm which I think is related to the poor performance of the diffuser.
Stripped out a good bit of the cabomba stems which were getting covered in hair/fuzz algae. I'm hoping this is as much to do with the unstable CO2 levels I've had due to the previous DIY CO2 and now trying patiently to reach 30ppm via pressurised. You can tell when you start getting close to the 30ppm figure as pearling increases noticeably, though I am still not getting vast amounts of it with 2.5wpg, not sure how much I should get though!
The h.c. is growing steadily, no issues growing any of my current plants. I have a tiny bunch of rotala wallichii salvaged from the poor plant I received a few weeks ago, can't really see it at the moment hiding behind the large white rock to the right of the tank.