Losing my nitrate battle

[Wills]

@Characf since you are in the UK if you want to try RO water take a look at https://www.spotlesswater.co.uk/
Not used them myself but they claim 0TDS and that their water is perfect for aquaria. At 3.5p per litre its a lot cheaper than your LFS - as long as you are prepared to lug containers of water about. (I used to buy it from my LFS until I got fed up with having to drive there every week and lugging 100l of water)

Quite jealous of that company... quite a good idea really. 87.5p for 25 litres which is one of those jerry cans LFS charge about £4.99 for.

Wills