So, after developing some film last night and then cleaning up the fix stains on the laundry floor this morning, I too have been wondering about leaky patterson tanks.

So, this morning, I am going to try 3 wraps of teflon thread tape on the threads and see how that goes.

The other though (& I am kind of suprised that one has mentioned it) is to use a standard industrial variety O ring in the lid of the tank. Surely, that will help with sealing, or am I missing something?