Prime Ordeal
Fish Herder
- Joined
- Sep 24, 2011
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am i missing something? who is tom barr?
He's the person who introduced the idea of estimative indexing to plants ferts.
am i missing something? who is tom barr?
True scientific with full methodical write up > Vague print on the packet.
I didn't realise I would cause such an argument with this post lol.

My first post links to it on eBay if that's any help?Give me a few hours, trying to find it.
Good pointA point to consider - even if it does take hours to change, most of us don't test our water several times a day. It's likely that this will still pick it up before we get around to testing.