I know I skipped posting about Week 30's water marble (which I did! There's just no photo evidence), however I wanted to catch up to everyone else and post the crackle mani in a timely fashion.
This is Revlon Timeless topped with black crackle (can't tell which brand) and China Glaze Oxidized Aqua. This came out better than my other crackle mash up. A tip if you are going to try to layer crackles but don't want them cracking in the same spots, but a thin layer of topcoat over you previous crackle. Wait for it to dry, and then you can put your next layer on.
So maybe another water marble will happen soon!