My freshwater 19 gallons or 72 Litres

Hi everyone, i am new here so i want to introduce my tank. I am from Croatia so excuse me for bad english, i will try to be clear.
Here is my 19 gallons (72 litres) freshwater aquarium. This is my second aquarium and it is 2 month old. My first tank was 10 years old without any change in that period.
After my first tank era ended i wasn't involved in aquaristics for two years. Now i got the new one.

For the surface i chose potting soil and volcanic, and over that gravel grain size 2-5 mm.
Fauna consists: three Corydoras, two Ancitrus, six Indian batis, five x-ray tetra and twelve Otocinclus.
About equipment, there is a DIY external filter with a flow of 600 liters, a small diy skimmer and diy lighting 3x18w T8...













That is it for now.
I am also interested is there anyone who was bread otocinclus, and keep the baby ?
Thanks !

Thanks for the compliment and thank you very much for the link, this is great ! Thanks a lot !

Thank you everyone,
I make pictures with cheap 7 mpx camera, but i try to darken the room, minimize exposure and turn off the flash, so that is why the image is a little darker. I also hold the camera on the stand and use a timer switch to eliminate camera shake.