Back to the DIY CO2 :-)
Just for the record, I went back to the DIY Yest CO2. Its been about 4 month since I gave up on CO2 and the plants were doing fine but the leaves don't really look that nice. I had a problem with the Amazon Sword as well, leaves going bad in short time. This plant definitely needs more ground fertilisers, so I introduced lots of Iron rich Amtra balls. I will freez some potting soil together with some aquarium peat granules, so it is easy to be placed under the plant, once it is in an ice cube. Approx. month ago I lost one of my Angels. The female brutally killed the male one. Yeah, women ;-) Just joking.
I feel like changing my live stock. I will return my Angel and the 11 Cardinals to my LFS and get some Denisonii barbs instead.
Will keep this blog updated.