Argos sand for me too in both my tanks. Clean, cheap and easy.
Just a thought did you know that B&Q now supply prewashed Play Sand

)
I did wash it again but dont think it was required that much as hardly any debris came out.
Dont forget to put some in a small jar or cup first and add water to see if much debris or bubbles are given off, just in case.
I did find two easy ways to wash it...
Put a bucket full of sand in a old pillow case and use the jet setting on a hose pipe -
jet blast it with the house pipe then leave to dry before emptying in the tank.
Alternatively buy a cheap salad mixer or colinder with small holes inside, wrap a pair of tights over the top. Put the sand inside then wash over the bowl or sink.... until the water runs clear, any fine debris will be washed through the tights and the clean sand can be placed direct in the tank.
Its alot easier and quicker than washing it 3-4 times
B&Q currently offer normal play sand and also washed sand though if you check the web site out they have it priced wrong....
They have the washed sand priced cheaper when it should be the other way round
Good luck.....
Argos sand for me too in both my tanks. Clean, cheap and easy.
Just a thought did you know that B&Q now supply prewashed Play Sand

)
I did wash it again but dont think it was required that much as hardly any debris came out.
Dont forget to put some in a small jar or cup first and add water to see if much debris or bubbles are given off, just in case.
I did find two easy ways to wash it...
Put a bucket full of sand in a old pillow case and use the jet setting on a hose pipe -
jet blast it with the house pipe then leave to dry before emptying in the tank.
Alternatively buy a cheap salad mixer or colinder with small holes inside, wrap a pair of tights over the top. Put the sand inside then wash over the bowl or sink.... until the water runs clear, any fine debris will be washed through the tights and the clean sand can be placed direct in the tank.
Its alot easier and quicker than washing it 3-4 times
B&Q currently offer normal play sand and also washed sand though if you check the web site out they have it priced wrong....
They have the washed sand priced cheaper when it should be the other way round
Good luck.....