Thanks to all !
It's a 20 L tank, lighting 24w, DIY CO2 and a little filter inside.
Plants grew in my pond this summer (the one made with a pool). Now, I got a lot of crypto, vallisneria, echinos, rotala, glosso, lilaeopsis, mosses, monoselenium. Gonna make another tanks with. Actually, wanna write a book about tanks. I met some publishers. Wait & see...
Was a bit lost cause some told me it was Ok, but just a tank with 3 stones and some grass lol. Indeed I love this one, but as I worked hard on it, made several versions before this one, may be I wasn't enough critical. Thanks again
I hope I could meet you one day or another in NZ.