This water is about as dark a green as I’ve seen it, but we usually open in May. The very worst was the year we moved here 20 or so years ago. We were shocked and surprised when we found a bloated, drowned skunk under the cover. P.U.!!!
When we removed the safety cover, the pool was nearly right full of green-black smelly water. Even though we drained it back down to below the water returns in the fall, the heavy snow melts and the spring rains had re-filled it to nearly overflowing. It was particularly green because we left it fermenting until June. It always amazes me to see the incredibly dirty water turn back to clear within a matter of hours once the filter and chlorine start to work..
Vacuuming while we send the extra water to drain takes a lot of the sediment with it.
In 3 hours or so, the water starts to clarify.
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It's so amazing, but by 8pm it looks like you could go for a dip!