A cloudy reservoir, flakes on the bottom of a bucket, or an EC number that drifts after mixing usually starts with one problem: nutrient mixing order. The nutrients may be right for the plant, but concentrated products met each other before water had a chance to dilute them.
The rule is simple. Start with clean water. Add one product at a time. Mix until it is fully dispersed before adding the next product. Never pour two concentrates into the same measuring cup, bottle cap, or reservoir corner.
That matters in a small hydro reservoir, a hand-watered coco crop, and a bucket mixed for basil, lettuce, tomatoes, pothos, or monstera. Bionova’s base feeds and single-mineral additives give you control, but they need to enter the water in a controlled order.
The nutrient mixing order that prevents problems
Use this working order: water first, SiLution, calcium and magnesium corrections, base nutrient, micronutrient correction, stimulators, bloom additive when called for, then EC and pH. Keep the product label as the final authority on dose rate. If a label gives a different sequence for that product, follow the label.
The main point is dilution between every addition. A five-gallon bucket of water is not the same as a bottle of concentrate. Products that are stable after dilution can react when they touch in concentrated form, especially calcium, phosphorus-containing feeds, and mineral additives.
Start with your full water volume
Fill the reservoir or mixing bucket with the amount of water you plan to use. Room-temperature water is easier to mix than cold water, and it gives your meter a more useful reading. If you use filtered or reverse-osmosis water, remember that it starts with very little mineral content. That can be useful for control, but it also means your calcium and magnesium plan needs to be deliberate.
Run circulation in a reservoir before adding nutrients. In a bucket, stir thoroughly after every product. Do not rush this part. A minute of mixing now is easier than cleaning mineral residue out of pumps, air stones, drippers, and lines later.
Add Bionova SiLution to water first
Add Bionova SiLution into the full water volume first and mix it well. SiLution is a mono-silicic acid product used when you want to include silicon in the feed program. Starting with it gives the product water to disperse into before the mineral salts arrive.
Do not add SiLution into a cap with Bionova Ca 15, Bionova MgO 10, or a base nutrient. Measure each product separately. If you are feeding a young lettuce crop, microgreens, or recently rooted basil, use the rate appropriate for that stage rather than assuming every plant needs a full-strength reservoir.
Build the mineral side before the base feed
Use Bionova Ca 15 only when calcium needs correction
If your water source or crop calls for more calcium, add Bionova Ca 15 next. Mix until the solution is uniform before moving on. Ca 15 is a single-mineral calcium additive, so it lets you correct calcium without changing the rest of the base feed.
This is useful when leaf growth tells you the base recipe needs an adjustment or when low-mineral source water leaves you short on calcium. It is not a reason to add calcium automatically to every batch. More inputs mean more variables, and a good reservoir is built around what your water and plants actually need.
Add Bionova MgO 10 separately
Add Bionova MgO 10 after Ca 15 if you need magnesium. Again, mix completely first. MgO 10 gives you a direct magnesium adjustment without moving to a different base nutrient.
Calcium and magnesium often get discussed as a pair, but they are still separate corrections. A coco grower using Coco Forte A+B may need a different adjustment than a hydro grower running Nutri Forte A+B Hydro. Watch your plants, know your starting water, and avoid treating a calcium-magnesium additive as a blind insurance policy.
Use Bionova Micromix for a targeted trace-element correction
Bionova Micromix comes after the calcium and magnesium additions. It is for a specific micronutrient correction, not a replacement for your base feed. Add it only after the earlier minerals are fully mixed, then give the reservoir another thorough stir or circulation period.
This is where single-mineral and trace-element products earn their place. If the base feed is otherwise working, a targeted correction is cleaner than changing the entire nutrient program. Keep notes on what you add, the dose, the source-water EC, and how the crop responds over the next several irrigations.
Add the correct Bionova base nutrient one part at a time
Choose one base feed for the root zone you are running. Do not combine base lines in one reservoir.
For soil containers and raised beds, use Bionova Soil Supermix. Add it to water after the mineral corrections and mix until the solution is even. Soil already contains some nutrient-holding capacity, so the feed plan should account for what is in the container, not just what is in the bucket.
For coco, use Bionova Coco Forte A+B. Add Part A to the water and mix it completely. Then add Part B and mix again. Never combine Coco Forte A and B as concentrates. The same rule applies even if you only need a small amount of feed.
For recirculating hydroponics, deep-water culture, drip systems, or a lettuce tower, use Bionova Nutri Forte A+B Hydro. Add Part A into the moving water, let it disperse, then add Part B. Keep the two parts apart until each has been diluted in the reservoir.
The A-then-B step is not optional housekeeping. Two-part feeds are packaged separately for a reason. Combining them before dilution can create solids that no longer stay available in the nutrient solution.
Finish with crop-stage products
Add Bionova Roots after the base nutrient is mixed when you are using it for seedlings, transplants, cuttings, or plants building out a new root zone. It belongs in the solution, not in concentrated contact with another bottle.
When fruiting tomatoes, bell peppers, strawberries, or cucumbers are at the right flowering and fruiting stage, add Bionova PK 13-14 after the base feed and other additives are fully mixed. PK 13-14 is a bloom-stage additive. It is not a substitute for a complete base nutrient, and it is not a product to use because the calendar says so. Use it when the crop stage and your feed plan call for it.
Keep the batch simple. A clean base feed with one justified correction is easier to manage than a reservoir loaded with every bottle on the shelf.
Check EC first, then set pH
After all products are mixed, let the reservoir circulate for a few minutes. Check EC with the HM Digital HydroMaster HM-200 Portable pH/TDS/EC/Temp Meter. EC tells you the total concentration of dissolved nutrient salts. Compare that reading to the target for your crop, stage, growing medium, and source water.
If EC is too low, add a small amount of the appropriate base nutrient, mix again, and recheck. If EC is too high, dilute with clean water, mix, and recheck. Do not chase the number by adding random additives. The meter gives you a reading, not a diagnosis.
Set pH last. Nutrients can shift pH as they dissolve, so adjusting it early only creates extra work. Check pH after the EC is where you want it, make a small adjustment if needed, circulate, and verify the final number. In a recirculating system, check again after the reservoir has had time to stabilize.
Common mixing mistakes that waste nutrients
The first mistake is pouring Part A and Part B together before water. The second is adding an additive directly onto a concentrated base feed. The third is checking pH before the full nutrient recipe is mixed. The fourth is skipping the meter because the solution looks clear.
Clear water is not proof that the feed is balanced. Cloudiness or sediment is a warning sign, but a solution can look normal while EC is too strong, too weak, or drifting away from the target. Use the HydroMaster meter, clean its probe as directed, and keep your readings in a grow log.
A disciplined nutrient mixing order gives you a cleaner reservoir and clearer decisions. Mix one product into water at a time, measure the finished solution, and let the plant tell you whether the next batch needs a correction.
