Hydroponics Step by Step

Hydroponics Step by Step (হাইড্রোপনিক্স স্টেপ বাই স্টেপ) is a complete, 100% ad-free, offline-ready hydroponic training academy, scientific nutrient calculator, and crop management guide designed for farmers, students, agronomists, and rooftop growers in Bangladesh and worldwide.

Built on Dr. Daniel Fernandez's open-source HydroBuddy v1.100 scientific formulation engine (GPL-3.0) and localized with Bangladesh Agricultural Research Institute (BARI) guidelines, the app combines three full step-by-step courses with precision hydroponic chemistry tools.

🎓 3 COMPLETE STEP-BY-STEP COURSES (50 FULL LESSONS) + BARI HANDBOOK
• Course 1 — Beginner Hydroponics Step-by-Step (15 Lessons): Start from zero knowledge, compare soil vs. hydroponics in Bangladesh, build a zero-electricity Kratky box under 1,500 BDT, wash and buffer local cocopeat, germinate seeds with 90%+ success, use digital pH/EC meters, and harvest leafy greens in 30 days.
• Course 2 — Intermediate Commercial Systems & Crops (15 Lessons): Master commercial NFT channel slope and flow engineering, Deep Water Culture (DWC) floating rafts for hot regions, Dutch Bucket drip systems for heavy fruiting crops, tropical polyhouse design, BARI Tomato/Capsicum/Cucumber/Strawberry production, IPM pest control, and commercial farm unit economics.
• Course 3 — Advanced Masterclass in Nutrient Science (20 Lessons): Deep scientific training on ion absorption kinetics, ppm stoichiometry, Stock Tank A & B precipitation chemistry, water alkalinity & acid pH titration, LMCv2 Electrical Conductivity (EC), Fe-EDTA/DTPA/EDDHA iron chelates, Vapor Pressure Deficit (VPD), NO3:NH4 ratios, and foliar nutrition.
• BARI Hydroponics Digital Handbook (11 Chapters) & 10 Bangladesh Farmer Success Stories from Dhaka, Gazipur, Jashore, Bogura, Rajshahi, Chattogram, Satkhira, Mymensingh, and Sylhet.

🧪 16-ELEMENT HYDROBUDDY NUTRIENT CALCULATOR
• Lawson-Hanson Non-Negative Least Squares (NNLS) linear solver computes exact fertilizer gram weights for all 16 macro and micro nutrients (N-NO3, N-NH4, P, K, Ca, Mg, S, Fe, Mn, B, Zn, Cu, Mo, Na, Cl, Si).
• Supports Direct Reservoir Addition and 100x/200x Concentrated Stock Solutions (Tank A & Tank B) with automatic CaSO4/CaHPO4/FePO4 precipitation warnings.
• Reverse Solver Mode converts any existing fertilizer weight recipe into resulting elemental PPM and predicted EC (mS/cm).

🌱 40 CROP FORMULATIONS & 44 SALTS DATABASE
• 14 Bangladesh-calibrated BARI & commercial crop recipes (Tomato, Lettuce, Strawberry, Cucumber, Capsicum, Melon, Mint, Coriander, Kangkon, Bok Choy, Green Fodder) plus 26 classic global formulations (Hoagland, Cornell, Sonneveld, Steiner).
• 44 preloaded fertilizers, chelates, and agricultural acids with solubility limits and editable BDT/kg market prices, plus a Custom Fertilizer Editor.

💧 BANGLADESH REGIONAL WATER & ACID pH TITRATION
• 12 water profiles (Dhaka WASA, Chattogram, Rajshahi Hard Water, Khulna Salinity Alert, Sylhet Surface Water, Rainwater & RO).
• Calculates exact mL/L of Nitric, Phosphoric, or Sulfuric Acid to neutralize carbonate alkalinity to target pH and carries acid N/P/S contributions into the main solver.

🩺 PLANT DOCTOR, FARM ROI LEDGER & MULTI-LINGUAL STUDIO
• Interactive visual symptom key for nutrient deficiencies, monsoon fungal diseases, and root rot.
• Farm CAPEX/OPEX ROI simulator and persistent batch logbook.
• Full Bangla (বাংলা) and English interface with Bengali/Western numeral toggle, plus Hindi, Arabic (RTL), Spanish, and an in-app Language Studio to add or customize any language.

🛡️ 100% AD-FREE, OFFLINE & PRIVACY FIRST
• Zero ads, zero subscriptions, zero personal data collected, and 100% offline operation.