Quantity   Component name
1 × Raspberry Pi Zero W ($10) Switched to this from the Pi3 because of its smaller size and lower power consumption.
1 × Camera Module with Fisheye lens ($15-20) I recommend the Sainsmart NoIR Wide Angle FOV160° Camera Module where you can easily adjust the lens focus and swap out different lens. I got mine from Sainsmart.com.
1 × Anker USB Phone Charger 5200 mAh ($20) Or you can also use a power bank with larger capacity llike 15600 mAh
1 × Schedule 40 Standard PVC Pipe 2" If you want a bigger unit, use 3" pipes instead of 2".
1 × Female PVC Connector 2" Protects the window and acts as second waterproof layer.
1 × Square head expansion plug The back cap! Hard to open once locked in solidly, but works very well, An alternative is the gripper with wing nuts.
1 × Acrylic or clear PVC 1/4" (6.4mm) thickness Clear PVC bonds really well with the PVc body, but Acrylic gives a slightly better visual quality.
1 × Optional: Neopixel x16 RGB LED Ring ($10) You can choose larger LED rings as long as the diameter fits in your pipe.
1 × Optional: Atlas Scientific Oxygen Sensor Detecs dissolved oxygen in the water. Can be replaced with other sensors or no sensor at all!
1 × Optional: WittyPi Mini ($21) A little board to help with timekeeping (RTC) and power management of the Pi by shutting it down and starting it up.