Augus,
You definitely need another light. This 27 watt WalMart wonder is useless for what you are trying to do.
Keep in mind that the HC that you just got was grown under ultra strong light. 120 watts only 2 inches above the plant.
The Blyxa is not as hungry for light as the HC but still needs decent lights. In Aquasoil it will do great.
--Nikolay
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