I heared that off the person I bought my tank from. But as for the other things I phoned the waterboard yesterday to find out the exact details. My Ph is an average of 7.9 (but this drops to between 7.4/7.6 with me, I hear its because of the bogwood) And my Carbonate hardness is 40
You need to know your General Hardness (gH). Carbonate Hardness (kH) is not what is meant when discussing a fish's requirements for hardness. You also need to know what units hardness is expressed in by your water board as it varies and may need to be converted either to ppm or German Degrees to be in fishkeeper's language.
As hardness (both kH and gH) can be affected by substrate and decor, the water board's figures are a general guide, but you do need to know the actual figures for your tank as if it's changing in there you need to be aware of it.
The API gH/kH combined test kit is good and about ?8 on eBay. Lasts for years.
Right just bought a test kit off ebay, mayaswell test. But the fish I do have seem very healthy and happy, it feels a bit of a shame to move them into a new big tank, the 90L has really matured now, but they do need room to grow.