You should have no problems with Blyxa and moss. DHG is questionable.
Eco complete is inert substrate: using root tabs (in moderation) is a good idea. With that light over a 60g I would start with 1/3 to 1/2 of EI recommend fertilization dosage and see how it goes.
Check for the fertilization regime in the sticky in the Fertilizer section of the forum.
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