Cutting rockwork in tank.

[JayM]

You could also try "bow opening" or "reverse opening" pliers. The jaws open when the handles are closed. Slip them into a crevice and squeeze.

 

[Tcook]

If you drain the tank...
Or atleast clean all the bearing grease out of them??!

No need to. You can use one of these over the flex cable. There is probably a similar sheath in the dental world.

https://medexsupply.com/mckesson-ar...MIqYnhnNurhAMVSAutBh0sYQEzEAQYASABEgIraPD_BwE

 

[907_Reefer]

If you drain the tank...
Or atleast clean all the bearing grease out of them??!

No need to. You can use one of these over the flex cable. There is probably a similar sheath in the dental world.

https://medexsupply.com/mckesson-ar...MIqYnhnNurhAMVSAutBh0sYQEzEAQYASABEgIraPD_BwE

I was going to say, I've had good luck with an electric toothbrush underwater for GHA removal. Plastic baggie, bunch of rubber bands, works great!

 

[Joekovar]

Home Depot has a huge pair of slip joint pliers for like $20. Like up to 5-6" gap between the jaws huge.

I wonder if you could get enough leverage with them to crush the section loose. Maybe even take a grinder to them to get makeshift giant bone cutters.

 

[rennjidk]

I was going to say, I've had good luck with an electric toothbrush underwater for GHA removal. Plastic baggie, bunch of rubber bands, works great!

Now just melt a jigsaw blade into it with a Bic lighter, and OP is in business. The ol' SHIV-O-MATIC 3000. Great for in tank rock work and rec yard snitches.

 

[kilnakorr]

I was going to say, I've had good luck with an electric toothbrush underwater for GHA removal. Plastic baggie, bunch of rubber bands, works great!

Clever!

 

[kilnakorr]

Update.
Managed to take a few bites along the edge but looking at older images from the scaping, I could see the left side was a bigger thicker piece of rock.
I did manage to get 90% of the top so pretty pleased with all the non shaded room it resulted in: