Yellow new growth, pale lettuce, burnt leaf edges, and slow roots often get blamed on the nutrient bottle. Usually, the real problem is the feed mix, water quality, pH, or EC. Hydroponic nutrients only work as intended when the root zone stays in range.
The answer is not to keep adding more products. Start with a hydro base that matches the system, mix it in the right order, measure the finished reservoir, and correct one mineral at a time when the crop gives you a clear reason. That is why Bionova’s separated base feed and single-mineral additives are useful in a working hydro garden.
Start with water, not the nutrient bottle
Every reservoir begins with the source water. Municipal water can arrive with a meaningful EC before you add feed. Well water may carry calcium, magnesium, bicarbonates, or sodium. Reverse osmosis water starts much cleaner, but it also starts with fewer dissolved minerals.
Measure source water before mixing anything. The HM Digital HydroMaster HM-200 reads pH, TDS, EC, and temperature in one tool. Write down the source-water EC and keep it with your reservoir notes. If a lettuce tower runs well one week and struggles after a refill, that first number gives you a place to look.
For most hydroponic vegetables and herbs, a finished pH of about 5.5 to 6.2 keeps the main nutrient elements available. Letting the reservoir move gradually within that range is normal. A pH that keeps climbing or crashing is not a reason to chase it every hour. Check the water temperature, aeration, reservoir cleanliness, and EC before assuming the nutrient itself is at fault.
Use filtered or reverse osmosis water when your starting EC is already high, when the water leaves deposits, or when repeatability matters more than convenience. With very clean water, build the feed deliberately. Do not assume it contains the calcium and magnesium your source water used to supply.
Choose a base made for hydroponic nutrients
Bionova Nutri Forte A+B Hydro is the base feed for recirculating systems, drip-fed hydro, reservoirs, and other soilless water-based setups. It supplies the core nutrition plants use through vegetative growth and fruiting. Butterhead lettuce, basil, cucumbers, strawberries, bell peppers, and cherry tomatoes all need a complete base before they need a corrective additive.
The A and B bottles stay separate for a reason. Concentrated minerals can react when they meet directly in the bottle or measuring cup. Add Part A to the full reservoir first and circulate thoroughly. Then add Part B and circulate again. Never combine concentrated A and B together before dilution.
Follow the label rate for the crop stage, then verify the finished solution with the HydroMaster HM-200. EC tells you the overall concentration of dissolved salts in the reservoir. It does not tell you whether the balance is right, but it does tell you when the reservoir is drifting stronger or weaker than your target.
Seedlings, rooted cuttings, and microgreens generally need a lighter feed than established tomato or pepper plants carrying fruit. Plant size, light intensity, air temperature, and water use all matter. A tomato under a strong LED light will drink and feed differently than a pothos growing in a bright room. Use the crop’s response and your EC record together instead of feeding every plant at the same strength.
Add root support early, before the roots are stressed
Bionova Roots belongs early in the crop cycle, when plants are establishing in a new hydro system, moving from propagation into a larger site, or recovering from normal transplant handling. Use it with Nutri Forte A+B Hydro according to the label, not as a replacement for base nutrition.
Roots are easy to overlook because they are out of sight. In hydro, they set the pace for everything above the reservoir. Healthy white roots with good oxygen access take up water and minerals more consistently. Dark water, warm reservoirs, clogged lines, or a root mass sitting without enough oxygen can create problems no additive will fix on its own.
Keep the reservoir covered from light, keep irrigation lines flowing, and make sure your system provides the oxygen level it was designed for. Then use Bionova Roots as part of the normal establishment program rather than waiting until the plant has already stalled.
Correct calcium, magnesium, and micronutrients one at a time
A complete base should remain the center of the feed. Additives are for a known need, a water-quality limitation, or a crop stage that calls for a measured adjustment. Making several changes at once removes the ability to tell what actually helped.
Bionova Ca 15 is the calcium mineral additive to use when a calcium adjustment is needed. It is especially relevant with reverse osmosis water, soft water, fast-growing fruiting plants, or a feed plan where calcium needs to be increased without changing every other part of the base nutrient. Calcium is not mobile inside the plant, so new growth is where shortage symptoms often first show. But do not diagnose from one leaf alone. Check root conditions, pH, and reservoir EC before adding more.
Bionova MgO 10 is the direct magnesium adjustment. Magnesium is central to chlorophyll production, and older leaves may show the first signs when the plant is short because magnesium can move to newer growth. High potassium or calcium relative to magnesium can also complicate uptake. That is the advantage of using MgO 10 rather than raising the entire base feed just to address magnesium.
Bionova Micromix is for trace-element support when your water source and crop response point to a micronutrient gap. Iron, manganese, zinc, copper, boron, and molybdenum are used in small amounts, but small does not mean optional. Keep pH in range first. Many apparent micronutrient problems are availability problems caused by pH, not a lack of product in the reservoir.
Use SiLution and PK 13-14 with a clear purpose
Bionova SiLution provides mono-silicic acid, a form plants can take up readily. It fits a regular program for growers who want silicon in the reservoir without relying on a high-pH silicate product. Mix it into water as directed on the label, allow the reservoir to circulate, then continue with the rest of the feed plan.
For flowering and fruiting crops, Bionova PK 13-14 is a targeted phosphorus and potassium additive. Use it during the appropriate flowering period at the label rate. It is not a substitute for Nutri Forte A+B Hydro, and it is not a reason to push EC past what the crop can handle. In a cherry tomato or pepper reservoir, the plant still needs balanced nitrogen, calcium, magnesium, and micronutrients while it is setting and filling fruit.
This is where records matter. Note the date, reservoir volume, source-water EC, base-feed amount, additives, finished EC, pH, and what the plants looked like. You do not need a complicated spreadsheet. A notebook beside the reservoir is enough. After a few refill cycles, you can see whether the crop is taking up water faster than nutrients, whether EC is rising between top-offs, and which correction you actually made.
Watch the reservoir between mix days
Mixing the right hydroponic nutrients is only half the work. The reservoir changes as plants drink. If water level falls while EC rises, the plants are using more water than nutrients. Top off with appropriately adjusted water and reassess. If water level falls while EC drops, the crop is taking up nutrients quickly, and the next mix may need review.
Do not make large corrections based on a single reading. Confirm the meter is clean and calibrated, circulate the reservoir before sampling, and measure at a consistent time of day. Keep a second look on leaf color, new growth, roots, and irrigation flow. Numbers guide the decision, but the plants tell you whether the decision fits.
A stable hydro crop is built from repeatable habits: clean water, Bionova Nutri Forte A+B Hydro as the base, Bionova Roots during establishment, and Bionova Ca 15, MgO 10, Micromix, SiLution, or PK 13-14 only when the crop and water call for them. Mix carefully, measure every reservoir, and change one variable at a time.
For your next reservoir, start by checking source-water EC and pH before you reach for another bottle. That one reading often tells you what the plants need next.
