I am planting lettuce using hydroponic, my tank is 70liters , what is the mixture for lettuce for my size of tank

The common formula seems to be 10G + 10G + 5G in 5 gallons of water for lettuce. 70 liters = about 18.5 gallons. I'll just make my math 18.5 gallons divided by 5 gallons = 3.7 So it would be 37G + 37G + 18.5G . I imagine most people would say 2G + 2G + 1G per gallon. 70 liters = 18.5 gallons, so once again the answer is 37G of Calcium + 37 of Masterblend + 18.5G of Epsom salt.

How long would the 25 pound kit last for a average hydroponics user? Many years? Any examples from your guy's own experience?

Yes for me it will last years I have 2 55 gallon drums with a cucumber and watermelon plant in each. And 10 5 gallon buckets with a mix of cucumbers tomatoes and peppers. 2 plants in each I will not put anything with cucumbers next year they drink too much. And two 7 gallon seed starting tubs. Anyway I could do this for years. On the amount I have and I mixed up 20 or so gallons for other people.

Does this generally tend to raise or lower pH?

Lowers the ph . If I use my tap water which is about 8.3 it ends up perfect at 5.6 to 5.9 . If I use rain water which is closer to 7 it ends up a tad too low so I add ph up.

May I use this fertilizer for chili pepper plants growing in the ground?

Yes you can. I made a batch of this solution and used it on peppers in the garden and I had the most bountiful harvest of peppers possible.

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MASTERBLEND 4-18-38 Complete Combo Kit Fertilizer Bulk (2.5 Pound Kit)

MASTERBLEND 4-18-38 Complete Combo Kit Fertilizer Bulk (2.5 Pound Kit)

Product ID: 42223037

Details

Brand
MasterBlend
Item Form
Powder
Item Weight
10 Pounds
Liquid Volume
5 Liters
Specific Uses For Product
Plant Growth

🌱pro-grade plant growth formula

💧100% water soluble

⚗️3-component precision mix

AED 198

Duties & taxes included

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Description

🌿 Unlock pro-level growth with every mix — don’t let your garden miss out!

FLEXIBLE BULK OPTIONS - Available from 1 lb to 62.5 lbs to scale with your gardening ambitions
CLEAR PACKAGING FOR EASY USE - Pre-measured, transparent bags simplify mixing and prevent guesswork
TRUSTED BY EXPERTS WORLDWIDE - Used by horticulture pros globally for superior, consistent plant growth results
PROFESSIONAL GRADE SOLUBILITY - 100% water soluble powder ensures rapid nutrient absorption and hassle-free mixing
PRECISION 3 PART NUTRIENT BLEND - MasterBlend, Calcium Nitrate & Epsom Salt in perfect 1:1:0.5 ratio for optimal plant uptake

The MASTERBLEND 4-18-38 Complete Combo Kit is a professional-grade, 3-component fertilizer system combining MasterBlend, Calcium Nitrate, and Epsom Salt in a precise 1:1:0.5 ratio. Fully water soluble and trusted by experts worldwide, this 2.5-pound kit delivers optimal nutrient uptake for vigorous plant growth, packaged in clear, pre-measured bags for easy mixing and scalable use.

Specifications

ASIN	B072F2BL9D
Best Sellers Rank	#10,238 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #339 in Garden Fertilizers
Brand Name	MasterBlend
Coverage	Full
Customer Reviews	4.7 4.7 out of 5 stars (4,734)
Item Form	Powder
Item Weight	10 Pounds
Liquid Volume	5 Liters
Manufacturer	MasterBlend
Mixing Ratio	1:1:0.5
Model Number	MASTERBLEND-COMBO_2.5LB-KIT
Part Number	AACXZSG-119
Specific Uses For Product	Plant Growth
Target Species	Plants
Unit Count	1 Count

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