In my latest weekly update to my current exploration trip log thread, I mention discovering a system with two Helium-rich giants and a Water Giant. My question now is, has anyone found a system with two water giants in it before? Because I just found one, also in Xothuia Sector. Here's the system map, with points of interest highlighted.
To sum up, planets 5 and 7 are Water Giants. Planet 4, which co-orbits 5, is a huge Ammonia World. And of the five worlds orbiting the Y dwarf in the number 2 slot, three are terraformable, including a lovely blue marble waterworld (I've just realised, the four satellites I've labelled as "HMC" are actually all Rocky worlds). The other gas giant is a Class II. It's quite a valuable system, despite the lack of any ELWs, so you'll excuse me if I excise the system name from the pic.
This system has now tripled the number of Water Giants in procedurally-generated systems that I have found and scanned.

To sum up, planets 5 and 7 are Water Giants. Planet 4, which co-orbits 5, is a huge Ammonia World. And of the five worlds orbiting the Y dwarf in the number 2 slot, three are terraformable, including a lovely blue marble waterworld (I've just realised, the four satellites I've labelled as "HMC" are actually all Rocky worlds). The other gas giant is a Class II. It's quite a valuable system, despite the lack of any ELWs, so you'll excuse me if I excise the system name from the pic.
This system has now tripled the number of Water Giants in procedurally-generated systems that I have found and scanned.