ok substrate test inprogress.

[StirCrazy]

ok almost two hours later and here is the pic

as you see the dolomite (on the right) is way clearer than the sugar sand and ony after 2 hours. don't forget I took a spoon and stird them up to insure good mixing.

the samples are still to murkey to get a PH reading from my test kit (get new and wonderfull colours) but litmis strip places both between 7.8 and 8.2 with the sugar sand being closer to 8.2.

I will try again befor I go to bed tonight.

Steve