Average conversation is 71dB
Sound level Doubles every 3 dB so 36dB is ALOT quieter than 71
Ya gotta love PA. Im heading there Wed in PG.
The fans may be enough? it all depends on your canopy, and lights. How sealed is it? where you place the fan's? I would try different ways. If wanting to remove the heat in the canopy, jusrt putting them in the top, pulling UP wuould work great. But then that does nothing for the heat that the lights put into the water. For that, fans blowing across the water, between lights and surface of the water are best. My canopy will have inlet fans on ends, and exhaust fans on top.
Also, the more little fans you use, the more independently you can controll them. Get just the right amount of cooling needed at all times of the year. Gets a little warmer, turn a couple more fans on.