Very good dog indeed, Hemlock.
Surprised she didn't have a nibble of that finger after a while, haha.
Smokey11, I also use cool tubes, I think they are, well.....Cool! I am happy with mine so far. On hassle is giving them a clean now and then I suppose. Requires sticking you arm into them at awkward angles unless you dismantle your set up (I am lazy, I go for awkaward angles!) I got mine at my local hydro store, 25 euros each. You'll find them an all sorts of website, depends where you bide as far as ordering and transport costs.
Have a good Sunday, last game of the Football league today.
Peace, DST