Best bulkhead size for 75 gallon reef
Best Bulkhead Size for 75 Gallon Reef Tanks 1. THE SHORT ANSWER If you are running a 75-gallon reef tank in the Pacific Northwest, specifically with our hard tap water averaging a pH of 7.8, your bulkhead must be at least 3/4-inch (20mm) internal diameter. Anything smaller creates a velocity bottleneck that starves your skimmer…