Commenting on this thread as requested by the OP.
First, nice looking tank! Secondly, there are several things that most discus keepers would have done differently.
When you are growing out a group (10 is a good number by the way), you should start in a smaller tank (29g most likely for a few weeks, then to a 55g) and keep it bare bottom. This is because you should be doing frequent water changes, it is easier for the fish to find food, it is easier to clean, it helps the fish not feel "lost", etc. It is not recommended to grow out fry in a planted tank either. These fish should be kept in a tank between 86-88 degrees in my opinion. As they get older the temp can be reduced. Higher temps help to keep their metabolism up and with all of the frequent feedings you should be doing (5-6 times per day), this will help them get larger in no time.
As far as strains, I can't readily recognize anything yet as they are still small, but I see that you may have a blue diamond and possibly a cobalt. More pics (larger ones too) might provide better clues as to what you have. If you see any discus with 14 vertical bars it is a "snakeskin" variety for sure. If you see a fish with many black spots, commonly referred to as "peppering", then you have a pigeon blood based fish and these fish will not have vertical bars. The spots ARE the bars, or at least would be the bars if it wasn't a pigeon blood. The fish look fairly nice from what I can tell, but it really is hard to judge fish this age. Genetics and the shape/coloring/pattern of the parents is usually the best indicator as to what these fish will look like when they mature. YOU have the ability to impact their shape as well. Properly feeding them and doing regular maintenance will result in bulkier and more rounded shaped discus than starving them and providing poor water quality (I'm sure you've seen the bug-eyed, triangular shaped types before).
