This weekend I am moving 120g inside living room and yesterday checking complete leak test. noticed when water enters sump from drain, it's like niagara falls flowing in my sump how do I fix noise? I did following already and they didn't help. 1. added multiple elbows to drain 2. overflow has "h" pipe and hole on top, this is awesome, zero noise on overflow. but drain to sump still same noise. 3. added ball valve to return pump to reduce flow, that didn't help. 4. tried submerging drain pipe 1" inch below water and above , didn't help. thinking of adding ball valve to drain not sure if that helps. added pics of drain/sump and overflow, Please help !!