How to remove rifts in dimdoors mod

[HowsoArsenic]

I am having trouble with removing this black smoke next to my house in an ocean biome. I've tried rift removers but the process was incredibly tedious. No matter how many rift removers I make and use on the black smoke, there is still black smoke hovering over the water and eating up my world and spawning lots of enderman. Does anyone know how to remove this annoying black smoke? If so, can you please not mention worldedit or mcedit because I can't download that onto my modpack.