Internal vibration thoughts

[harley628]

Would like to hear your thoughts on the effects of internal pump vibration on corals.
Recently plumbed an external DIY filter using a power head and it caused corals to Immediately close. (Already went through the steps to find the issue) after much experimentation with flow rates, different angles of return, changing Pump To ensure it wasn’t stray voltage or the like and cleaning of pipes to ensure no uncured cement I changed to external DC PUMP. Problem solved. Opened back up within 10 minutes of removing power head. What are your thoughts on this? Previous experience?

 

[SaltISlife]

Not sure. Ive always wondered that. Put your eat on the glass its a ton of noise going on in there