Does this work for the new water biomes in 1.13 (frozen, cold, lukewarm, warm)? Minutor doesn't look like it's updated for 1.13 so you might not be able to pre-test it without a real world test.
I'm hoping to change part of the ocean near 'topia to warm so I can build a small coral fan farm.
[edit]: This chunk has lukewarm and warm waters if you want to test, and of course there's the iceberg area just a tad east of the E portal if you want to test cold & frozen: