Hiya Michelle, the gelcaps I have are made by Meadow Laboratories Ltd, Romford Essex. It's a grey container of 100 empty gelatine capsules and the small ones are size 4. If you draw a blank, let me know and I'll get some for you if you want some. I've got to order more myself soon & could split it 50/50. Strikes permitting, I can post them to you, they are very light.
My vet wouldn't drain either Max or Swampy as admitted it was a highly skilled procedure and he didn't know how and he thought it was too dangerous. It also depletes the body of electrolytes etc as the fluid disappears so fast. However, I've read about it being successfully done on the CRF site and also obviously Gillian's vet knew how to do it too for Sam. Mine were given IV frusemide to drain them initially, then the pills. If it's bad fluid, the vets seem to stay with frusemide (which makes cats and dogs feel unwell and weak as it depletes potassium) rather than the milder spironolactone which doesn't deplete potassium. (American yahoo group are always on about using that one instead of frusemide). Just a thought but has your mum's vet contacted a cardiologist for their opinion?