Normal dose would be 1ml per 50G. So, you would dose about 2.5ml for your 29G normally. If you are going to "overdose" you would look to double or triple the normal dose.
My suggestion to you would be to just double the normal dose, about 5ml. I really believe tripling puts fish and most certainly shrimps at risk.
Also, the idea of using the Flourish Excel to battle algae was to use the product for a 10-12 day period to kill off algae. It shouldn't be used as a consistent program.
Mike
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