Thanks for the reply Golden Paws
One thing I've spotted this morning whilst looking was soaking it in warm water before you spool it is really meant to help, I usually do this with mono anyway as it seems to go on better, then put it on under tension to spool it on, I use one of those Contraptions you put on a table with a spring so you can add a little resistance whilst winding it on, seems to work OK usually with mono, so maybe that will help,
I also read about the regular cleaning and stretching of it, I will be using it on my 2nd spools so I will still have hydrotuff loaded if I need it, I just think it could be a good idea for what I need it for, it will sink, be invisible and low stretch, when I looked at this guide below, the floor it just seemed a little stronger than the rest, fox illusion might not be so bad but I got burnt with their exocet braid that was absolute pony 😭 but strength is no good if it isn't supple and good at the rest of the job too 👍