Lava-like effect on B&W 120 Ilford film I processed at home

Hey everyone! I've just processed this roll of film at home and got it scanned and noticed in the sky at the top of each image there's some mad bubbling effect that looks like black and white lava, I'm really unsure what it is, but it's kinda ruined all these shots.

 

I shot it on my Mamiya 7ii with a 50mm I just got hold of, on Ilford HP5. I shot a second roll of film, same set up and no lava sky.

Anyone seen this effect before? Could it be from my development?

Thanks in advance.

 

 

 

It looks like part of the film was above the level of the developer in your tank. This can happen if the reel slips on the centre column in the tank - I have pictures of mine from years ago with this effect.

What's your agitation regimen? And do you add a wetting agent to your developer.

 

The effect has all the hallmarks of developer foaming, together with using slightly too little solution in the tank.

Hey John, yes i think you are correct, I had two rolls of 120 stacked in my paterson tank i i don't think i quite filled it all the way up.

 

And Rodeo i think you are correct too about the developer foaming, due to the slightly low level of dev in the tank.

 

thanks for helping me clear that up.