I doubt that you will be able to detect PAR if you are using racking, the rack's resistance will hide it from you, I would expect this racking any alloy. Use the 720 rule.
In my setup; I use a 1/4 HP modified aquarium chiller in series with a 420 GPH pump, this combines the cooling system with the agitation system, it works very well. My tank uses 5 gal. of electrolyte, the chiller can maintain a 32 deg. bath temp, with 300W of electrical power being dissipated in it (hardcoat experiments).
Agitation (recirculating the electrolyte very fast) has an advantage over aeration (air bubbles) in that it generates little to no acid mist. This will greatly reduce the ventilation issue all by itself.
Sulfuric acid fumes are both toxic and corrosive, and not only to you. It will rust anything ferrous in the same room in time.
You will want to keep your anodized parts wet until they are sealed, it does matter. A spray with water periodically should do it.
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