I have not vacced my Akadama since i have had it (had it about 5 months) my shrimp clean any excess food and what not. although on the odd occasion when the vacuum does go a bit close it does stir the substrate up a bit and it gets small clouds forming.
See thats the thing when you rush into things you just buy what you think is good :( i actually think i have some JBL fert coming with the co2 system i bought so i will take a look at that in the first instance.
Ok cool thank you for that info, i was thinking about taking all the sand out and putting a rich sub in instead, i will see how this sand holds up.
On a side note, you mention liquid ferts, i have Easy Life easycarbo, is this suffice?
At the moment i have normal sand which i bought from my LFS i suspect this is probably play sand but im not sure. My question is, will plants grow properly in just normal sand? or will i need to have some nutrient rich substrate underneath?