| I love bottle caps. They float and in an aerated filter they will catch some air and push up through the media doing a good job of mixing.
We have a recycling program that surcharges 5-cents for plastic bottles at purchase and a 5-cent redemption at the recycling center. However, you have to remove the bottle caps before turning them in because it is a different type of plastic than the bottle. Therefore, it's easy to scrounge bottle caps and the guys at the recycling center will save them up for you if you slip them some cash on the side.
You can also buy shreded plastic. They chop it up all those plastic bottles so it is more compact for shipping.
Still, I would rather have more kaldness if I could afford it.
-steveho pki |