A year ago I made this huge natural native saltwater ecosphere in a jar. It has had a lot of ups and downs, but to this day is still very successful. The ecosphere has housed crabs, starfish and a lot more and is currently still housing a lot of crustaceans, paramecium, worms, other invertebrates and even spionid worms.
Enjoy!
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A Year Ago I Put Saltwater in a Jar, This Happened | Natural saltwater ecosphere 1 year update