RBTA's (or others for that matter) need MH lighting?

Yes you can, for interim period, just make sure

regular maintenance on the current light casing,
replacement of lamp bulbs as they came due,
application of carbon to ensure the clarity of water is better,
protein skimmer and nutrient export would also help,
similarily regular small feedings would great.
 
great....sounds like you are on your way.

btw the next "advanced" area you may wish to research/read/consider is the allelopathy....

cheers
 
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