Agree, while I can see why you love the look of the tank as it is (it looks wonderful! and the anacharis is clearly healthy and thriving) I'd leave at least a patch of surface area open especially for the cories when they make a run to the surface for a breath of air. Albino cories are just (a lack of) colour mutations of a specific species of Corydoras - most often ones sold in shops are albino
C.aeneus (albino bronze cories) albino
C.paleatus (albino peppered cories) or albino
C.Sterbai (albino sterbai cories), most commonly in that order.
Hard to tell from the distance, but fairly sure from their shape, yours are albino
Corydoras aeneus, but all three species listed above are all facilitative air breathers, so would likely appreciate a little bit of open space, or the anacharis thinned if it gets much denser than in the photo and starts obstructing them taking a gup of air at the surface.
- Just a suggestion, but a lot of people use a ring, or make a ring out of something like airline tubing - to hold back floating plants from one specific area, usually to keep that area clear for a feeding spot, and if you went for something like that, I can imagine that being useful plus looking really good if it was right in the centre, letting that circle of light beam down in the centre, since the tank is pretty symmetrical either side already! Once the cories learn that food drops from whichever area you keep clear too, they'll soon get the hang of knowing that area is clear for them to dart up to get a surface breath.
My only other concern was where the filter output is, and if it's providing enough surface disturbance for enough gas exchange - whether a plant may become dense enough to choke out the surface in a tank
too much, when in nature, it's rare that a body of water is entirely coated by plants..?
But please, let someone who knows more than I do about the topic guide you in this latter question, because I'm not sure about the source I heard something like that from, and the water chemistry thing has never been my strong suit, so going to ask
@Essjay and
@Seisage for help. If they're aware of any potential problems with the water if the surface is completely coated by elodea or other plants, or if it's perhaps some old fishkeeping myth I'm hazily remembering, or even something to do with high tech tanks, and potentially problems with CO2 and oxygen levels rising and dipping during day and night cycles, and I'm misremembering something about that perhaps.
the only time it may be an issue is if they block out too much light for the plants growing below...but its easy enough to thin out so as long as you like the look then it's all good 
