I recently picked up a 75g to upgrade my 29. It came with a 30L refugium/skimmer/etc. The tank was drilled and has 2 lines in the overflow to feed the refugium. There are also 5 bulkheads installed for return feed from the refugium. The previous owner had ball valves apparently on every bulkhead to control flow. I plan on utilizing the 5 ball valves along with an AquaEuro AE1000 pump rated at 1057gph. Question is, are the 5 bulkheads too much return? Should some of them be plugged up? The majority of other setups I've seen simply have the small knuckled black spouts for return (some are cone, others are fan shaped) and only 2-3 at that. These are 1" bulkheads so obviously the flow won't be as concentrated as the smaller spouts that I see typically. The other thought I had was to again go with the 5 return valves and just alternate them from day to day to change the flow in the tank. The bulkheads in the tank now just seem like too much from setups I've seen in the past. Any advice or opinions? Thanks in advance!