Draining it Out
As soon as Oliver saw movement, he began getting to work. Time was of the essence and he wasn’t going to let whatever was moving disappear again. So, he opened the valve he installed and watched as water drained from the pond, allowing him to take a clear look at what it was.
The water ended up taking a few hours to completely drain, but Oliver was more than happy to wait. By the end of it, there was no water left. It was completely drained of water, everything was visible to Oliver. But he still couldn’t look clearly.