Sorry, my post is not about plants for your tank but your filters.
I run two 2028s on my 300l tank so I suggest that you change the 2215 to another 2217. In such a big tank, investing in "over filtration" will prevent a lot of potential problems from surfacing. And, as yours is a low maintenance tank, with two 2217s, you dun have to service them that often too.
Just my 2 cents.
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