looks like a 20 or 30 gal, am i correct on that? ive had up to a 3.3 group in a 30 gal long tank that did very well, but i reduced it to 2.3 after i found out 2 of my males were heavily competing for dominance. but ever since i began using the tank, it has proven to be fruitful as far as the breeding goes. it actually looks quite a bit like that bottom picture of yours, although it looks like you likely took that pic soon after setting it up (of course i could be wrong). over time, it has filled out a lot with the ficus and pothos, and theres a good bit of leaf litter, which is usually used to bury eggs.
anyhow, thanks for sharing!