What 0-40-0 Means on a Bottle of Cyco XL Growth Stimulant
The guaranteed analysis is the whole product: 40% available phosphate, no nitrogen, no potassium, nothing else declared. That makes this an additive rather than a feed, and it has to be read as one. It is derived from super phosphoric acid, which is a concentrated phosphate chemistry rather than a mineral salt blend. Two consequences follow from that and neither gets said often enough. The first is that a concentrated acid additive goes into water before anything else, never neat into mixed feed. A local pH crash will drop other elements out of solution. The second is that Cyco publish a safety data sheet for this product and it is worth having to hand. At 40% phosphate from an acid source, that sheet should be read before the cap comes off. On sizes, this is the 250 mL bottle. A figure of 100 mL often gets quoted for it, and that belongs to the smaller bottle. Cyco make it in 100 mL, 250 mL and 500 mL. One printing error is worth watching for as well. The analysis is often written as P205, putting a numeral where the formula takes the letter O. The correct form is P2O5.
When to Run a Root Development Additive, and When Not To
Cyco place this in the early growth stage and are specific about one boundary: not before week three. That instruction is worth respecting rather than reading as caution. A seedling or a fresh cutting has little root surface and almost no demand for phosphate. An early dose is just salt the plant cannot use. By week three a rooted plant is building structure, and that is when phosphate load actually converts into root mass and root hairs. More root hair means more surface for water and whatever is dissolved in it. That is the mechanism behind every claim made for a product like this. Phosphorus also sits in photosynthesis and in energy transfer. A shortage shows up as slow, pale, stalled growth rather than a specific deficiency symptom. Searchers keep asking whether this runs in flower, and the honest answer is that Cyco do not place it there. The published position is the growth stage. A flowering plant wants phosphorus and potassium together. A potassium-free additive will skew that ratio if it runs through bloom beside a bloom base. The dose rate is the one real gap left on this product. It sits on Cyco's own feed chart rather than on the bottle, so pull the chart for your medium before mixing.
Key Features
- Guaranteed 0-40-0: Forty per cent available phosphate, with no nitrogen or potassium.
- Derived from super phosphoric acid: A concentrated phosphate chemistry, not a mineral salt blend.
- Dilute before it meets feed: Never neat into mixed nutrient, or other elements drop out.
- Not before week three: Cyco's own instruction; a seedling has no use for the load.
- An additive, not a base feed: It supplies one element and nothing else in the analysis.
- Three bottle sizes: 100 mL, 250 mL and 500 mL; this is the middle one.
- Read the SDS first: Cyco publish one; request it before the cap comes off.
- Not positioned for flower: Cyco place it in the growth stage, not in the bloom window.
Technical Specifications
| Specification | Value |
|---|---|
| SKU | 760773 |
| Brand | Cyco |
| Product | Single-element phosphate additive |
| Size | 250 mL |
| Other sizes made | 100 mL and 500 mL |
| Guaranteed analysis | 0-40-0 |
| Available phosphate | 40% as P2O5 |
| Nitrogen | None declared |
| Soluble potash | None declared |
| Derived from | Super phosphoric acid |
| Stage | Growth; Cyco advise against use before week three |
| Use in flower | Not a position Cyco publish for this product |
| Dose rate | Published on Cyco's feed chart rather than on the bottle |
| Mixing | Dilute into water first; do not add neat to mixed nutrient |
| Safety data sheet | Published by Cyco; request a copy before use |
| Analysis notation | Often printed as P205; the correct formula is P2O5 |
| Barcode | 9356312000933 |