Welcome and good luck. Also your English is quite good.
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Sent from my SM-N900V using Tapatalk
Yeah, I didnt like it too at first.On my first try my althernanteras died because of lack on lighting, on my second try algae killed me because off too much lighting, so Im still in experimental phase. Im still using the top filter that came with the aquarium set and its blocking the light after I adjust the lighting higher, if my alternantheras on the background starts to melt, I would replace the filter with probably a canister filter, but after a week it looks to me that they are doing great and theyre so red!Im not an expert thoughGood luck with the tank. I don't like how the back part of the tank looks dark, almost if the plants back there are in the shade. Some may not do so well with that.