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I've been using their soil. Pleased with it, hasn't broken down in 3 years.

I'm using JBL Proscape soil with CO2. Its been in a year, my KH is now around 8, but my GH seems to vary between 14 and 20- but may depend on how close it is to my weekly water change. I'm sure both KH and GH has crept up over the year. London tap water.

I am using JBL Proscape soil. Should I clean it with one of the syphon type gravel cleaners, or just lightly Hoover over the top?

Have you raised this with JBL. I queried something on their Facebook page and they came back quickly.

My water is indeed hard London water My Jbl proscape did tests (which I'm sure are the same as the non JBL dip tests) tell me my tank water is now kh of 6 and Gh of 14.

It seems as odd as I think Jbl use the term, slightly acid. I have 18kg of the stuff and I have never seen my ph below 7

I've had my JBL Plant Soil in for almost 2 months with CO2 at around 15PPM- my PH seems to stick at a constant 7.0. Its about 7.8 out of the tap. Alan

Shrimp and plant soil are identical except that the plant has added nutrients which are absent from the shrimp soil. The soil does leach ammonia. Source :jbl proscape website

It's difficult to answer accurately, but my old tank was 100l and my gas lasted a month. The new tank is 200l and still going strong after 1 month. However lights are only on about 6 hrs and also using the Jbl taifun rather than glass diffuser, mainly as I keep breaking the glass ones!

I am using it on a new tank. So far so good. It looks good, soft so I won't scratch my glass too. Not cheap. Plants have been growing well. It has certainly reduced the hardness of my London tap water. Gh is now around 14 and kh 6, which I'm sure is lower than my tap water, not that I have...