this may depend somewhat on tap water - mine's very soft - pH jumps dramatically with some of these rocks (as in pH 6.0 to pH 8.5 - 9.0)e.g. top left may raise TDS but that's not usually a problem with the frequent and substantial water changes associated our planted tanks
Haha...kinda knew it - seen them there myself in MK must be a national range, but that's not unexpected they're owned by Tesco...
Hi Tim, Where about's in MK 🙂 I love rock hunting 😀
I go here in Enfield Thompsons of Crews hill, Lots of great gravels stones and rocks.
https://plus.google.com/photos/photo/109455706223152339284/6109206480992431666
Hi Roy, is this where you got the nice grey stones used in the hardscape for your 60cm? (which you are killing me by not planting yet by the way, haha)
One photo of the stream where I hunt stones and other bits 🙄