The label of the fertiliser sold by Agrilution lists the following contents:
| Inhalt | %m/V |
|---|---|
| Stickstoff | 1,98 |
| Nitratstickstoff | 1,78 |
| Ammoniumstickstoff | 0,20 |
| Phosphorpentoxid | |
| (P₂O₅) wasserlöslich | 0,87 |
| (P) | 0,38 |
| Kaliumoxid | |
| (K₂O) | 3,31 |
| (K) | 2,75 |
| Kalziumoxid | |
| (CaO) | 1,40 |
| (Ca) | 1,00 |
| Kupfer (Cu) | |
| chelatisiert durch EDTA | 0,002 |
| Eisen (Fe) | |
| chelatisiert durch EDTA | 0,040 |
| Mangan (Mn) | |
| chelatisiert durch EDTA | 0,010 |
| Molybdän (Mo) | 0,001 |
| Zink (Zn) | |
| chelatisiert durch EDTA | 0,0025 |
The bottle also says it was made in the UK by "Growth Technology Ltd.".
The contents above exactly match the contents listed by Growth Technology for their product "Formulex".
We've been using Formulex instead of Agrilution's fertiliser since mid-2022 without problems.
I've analyzed the electrical conductivity measurements from the dumps. The results can be seen in this sheet. The graph shows the Plantcube consistently asking for 15ml exactly 10 days after nutrient was refilled. Only one message differs from this pattern: 50ml is requested on 2023-08-14. Although this certainly seems warranted given the EC value, it's unclear what exactly triggers it (there were prior lower EC readings, so it's something more complex than a simple trigger level). In any event, it seems that attempting to maintain an EC level between 1250 and 1500 should produce acceptable results.
The Agrilution cleaning tabs state that they're made by the Austrian company "claro products GmbH". There are no further details to further work out which of the company's products it could be. The tabs are completely white and the wrapping is water-soluble. The 100% Classic Geschirrspültabs appear to be a match, but having ordered some of those, they're close but they're not the same thing.
Before Agrilution themselves sold cleaning tabs, they recommended that one should use a normal dishwasher tab dissolved in boiling water and added to the water tank before beginning the cleaning cycle. The selection of cleaning tab therefore can't really be critical.
The Seedbars appear to made from coconut soil (aka coconut coir). First attempts to press damp coconut soil into a seedtray and then to dry it have produced acceptable (if not perfect) results. I'm planing to design a small 3D-printed press for the seedbars to ease the process and to create the small recesses in which to place seeds.
Not yet investigated. The material appears to match that from normal aquarium or pond filters.