Description of the issue:

I have a pair of garden cloches which are supplied with water via pipes, and power via a LV connection. Both seem to automatically refill their supply of fertilizer each time it runs out. This makes for an absurdly over-powered cloche.

Versions & Modlist

Minecraft: 1.12.2
Forge: 1.12.2-14.23.3.2655
IE: 0.12-80
Full modpack

The fertiliser is a 1x speed modifier, as far as I can tell. That makes it no faster, add bonemeal and it gets better leave it alone and its at its default speed

So... it’s normal to see the green gauge wind down and the fill itself up again? I was expecting that it was a meter of how much bonemeal was remaining, and I’ve never actually added any bonemeal.

Yes it is. That bar shows the resources in use. That resource is the combination of a unit of fluid and a unit of fertilizer. It's normal.