You won't really be able to judge with pics of blyxa, how about you tell me how much in inches you want to cover in your tank.
Let me try to give you an example, the 200 pieces of blyxa I harvested from my 40g breeder that has 36x18 footprint, it was only covering 36x6 in my tank but it was extremely dense(you cannot see the substrate, it completely covered the whole area)
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