Pufferpack
Fish Herder
With 135 tanks that are usually overstocked I have need to go into the substrate and stir things up good to get all the waste
Makes sense, can't really dawdle around with 135 tanks to muck out
I found sterilised in a B&Q store not far from where I live
Jazz_UK...if you can it might be a good idea to bring a small magnifying glass with you to have a look at the sand before you buy it, just to make sure it's not to sharp.