Ed Seeley said:I believe the idea of them is to encourage bacteria in the substrate and provide different surfaces for bacterial colonisation. The ADA catalogue says that, "Its porous volcanic stones secure water circulation, and avoid the stiffing of the substrate." whatever that means!!! Bascially powersand contains organic matter and the volcanic rock provides structure and surfaces for the bacteria that gradually break that down to release its nutrients.
Graeme Edwards said:Hi guys,
Ive planted up a small tank in the Green Machine recently. I work the substrate with an influence from ADA's notion of thinking. When setting it up, I added a layer of Tropica substrate, then a layer of SERA syporax mini filter media granules and the Zambezi sand over the top of that. I added the syporax for the sole purpose of bacteria colonization. Now Ive not compared the cost of that to the power sand, but it works a long the same theme. you could use Ehime bio balls or anything that is small ( gravel size ish ) and highly porous.
I think its a clever idea. The tank Ive set up is only 4 weeks old now, so its still to early to say, but its looking good, healthy and the fish are very happy.
That's a shocker Clive - how do you know this - can you cite a source? Has someone done some experiments on how long AS and PS hold thier nutrient loads?ceg4048 said:The pumice is soaked in low concentrations of NH4 and high concentrations of NO3. Then peat is added. The aquasoil is baked clay soaked in similar nutrient mixtures. While the AS holds it's nutrients for longer the nutrients in Powersand are depleted within a month or so. A complete waste of money at these prices.