Thanks Pal
Should be interesting to see if a diffuser like this will make a difference.
I'm sure it will mate, another good positive when using diffusers and high air pressure is that it acts as a preventative method of keeping root rot at bay. I've replied again in my thread so nip over there when you get a sec, I've included a video of the micro bubble diffusers I'm trying to find in the UK to no avail!