Diving in the dome is a unique experience. The warm water is lovely, I’ve been there several times, mostly for certifying students.
The viz is hit and miss, depending on how many people were in the water prior to entry; rather, what they were doing in the water. If people go down to the bottom and stir it up then the viz drops.
The staff has not allowed solo diving for the past several years. You can “higher” a DM for around $25 or hope to come across an insta-buddy. You only get a two hour slot so, set your gear up before your time slot begins. I’ve been there when one of the staff members was harping at people to get out because it was past their time.
Taking a light is preferable. I’ve dived it without a light, but taking one with you on the dive will allow you to see more stuff.
They do rent gear. Be sure to double check the gear to ensure it is functioning properly. I’ve never rented gear there except tanks, but I’ve seen others who have. One group next to mine checked a dump valve on the BCD and it came off. That group’s instructor told her student “good job on your check and welcome to renting scuba gear”.
Since the elevation is a mile high be sure to make your ascent nice and slow, and your safety stop for 3 to 5 minutes and at a depth of around 13 feet, even though there is a pvc pipe hanging at 15 feet.