Hi @kurt_bluerobotics, sounds like a great experience - thanks for sharing! 
You’ve got some interesting photos, and it’s particularly cool to see such a decked out BlueROV2! It’ll no doubt be extra interesting once there’s more you can share about your water test sensor kit, and there seems to be some previous community interest as well 
By the way, I’ve moved this post to its own topic, so there’s a dedicated place to discuss this exploration, and the organisations and components involved