Sophos9, the red plant is Alternanter reineckii either rosefolia or lilac. Jamie, you're dissapointed with its growth, but it is not what I consider a fast-growing stemplant. It grows compact under stronger lighting. It is a steady grower, however, and I have found it to be pretty undemanding. I have it prominently featured in two of my low-light tanks. I get much more vertical growth.
Sorry I missed this thread. It is my understanding then that you have changed this tank from a low-tech to something more like a high-tech? The presence of CO2 injection and that diffusor and your lighting makes me hesitate to call this a low-tech, which to my understanding doesn't inject CO2. Your system is actually pretty similar in concept to my 20g and my 36g, both of which are lower light systems with added CO2. Both these tanks, however, are well below the 2WPG barrier. Be careful with your lighting, it is stronger than you think. Your tank is quite large and WPG is not as effective a lighting estimate with both smaller and larger systems. With larger systems, less lighting is needed to achieve the same effect, and 2.4WPG may not seem like a lot of light to you, but it is a goodly amount. Good enough light for me to recommend that you up your stemplant population by a good margin. This, to me is not a low-tech tank, and should be treated as a high-tech tank.
Make sure the crypts have enough food. Sand is not the best substrate for these plants, the compaction can reduce circulation, but I'm assuming you've got a nutrient-rich base layer. If the sand doesn't compact much, the crypts' roots should find there way there. Your plan for rootabs is a good one. Same story with the valis
If I'm reading what you originally intended in your first post correctly, you could have easily set this system up with the plants you wanted with half the lighting? 1.2WPG would have been more than sufficient for the plants you have. Why did you opt for more lighting? Just curious.
That being said, it is a lovely tank. I would love to set up a larger system eventually, but I've not the cash for even the tank right now, so I must content myself with smaller systems.
The plecos will need to be rehomed soon. The brown algae you're getting now is pretty common in newer systems and many algae-eaters consume this.
Again, I apologize for ignoring this thread. I deal mostly with low-light, low-tech, low-cost systems and it would have been good for me to read this.
llj