Underwater camera choise aka scuba cctv

[thickglass]

Hi guys, I used to have CCTV system (which is no longer used right now) including HDMI CCTV Cameras, HDMI Modulator, RF Splitter, so i thought I could use this gear for viewing my tank just for fun Can you advice me any HDMI comliant underwater camera?

 

[michaelrc51]

HDMI camera??
Cameras are either IP via ethernet cable or coax using RG cable. Some cameras have HDMI out but it really isn't necessary, you can achieve the same thing via IP without the distance issues or price of cables. They still use the same compression and a lot of the higher MP cameras don't come with it.
I wouldn't suggest using HDMI and then converting it. I am sure your cameras have IP or analog out as well.
What resolution are your cameras?