loving the tank, can you tell me what ferts you are using, how much light, CO2....etc....
Sure. So technical side of this setup as of today:
tank is 47x30x40H cm custom made, float glass 6mm, transparent silicone;
light unit
1*36W Osram Dulux 865 in custom made cover lid; that's quite bright for such tank so CO2 is needed; also a lot of floating plants are used to reduce light (entire surface is covered by plants, I remove them when take photo);
photoperiod is about 8-10 hours/day (on work days about 6 hours at morning and 2 hours at evening, so family can enjoy the tank after work; on weekend usually from 10am to 20pm);
internal filter
aquael fan mini 240l/h;
internal heater
aquael 50W;
CO2 DIY yeast-based generator, 2 bottles 1.5l, refill each bottle on alternate weeks; CO2 reactor is JBL Taifun (I removed 2 of 5 sections now, it's quite effective IMO);
recently I've added air pump on timer, it works usually at evening to increase oxygen level before night;
fertilizers:
micro, macro, potassium and iron from Aquayer (Ukranian small company, the products are available in Ukraine, Russia, and probably in some other neighbor countries); the amount of fertilizers - according to recommended dose on bottle, this layout is slow, so we don't need to overfeed plants atm;
also we're using some water additives to slightly lower kH and to add black-water extract (also from local small companies);
recently we started to add alder cones and oak leaves in small quantity. The water got a tint of tea color (yellowish), I think that's good for cardinal tetras and other fish. At least I can see their colors are brighter than in clean water.
Usually Julia should do 30% water change every weekend and clean the filter. Sometimes she is too busy for that. I'm asking her at least clean filter if not water change.
And water parameters: only tap water is used for water changes, last weekend pH was about 7 (8 in tap water), kH ~ 11 (strangely high, probably something raises it up, seaside gravel?), GH ~ 12 (ok for tap water), NO3 and PO4 both were about zero, so I've asked Julia to start dosing macro (NPK) now.