In Stock

Estimative Index (EI) Aquarium Nutrients Package - Bags

14 reviews Write a Review
Maximum Purchase:
5 units
Current Stock:

Frequently Bought Together:

Estimative Index (EI) Aquarium Nutrients Package - Bags
Inc. Sales Tax (Florida Only)
Ex. Sales Tax (Florida Only)


Estimative Index EI - Best Aquarium Fertilizer Package

Our Estimative Index EI Package includes:

  • GLA EDTA Micromix (M) - 1lb/bag
  • Potassium Nitrate (KNO3) (N) - 1lb/bag
  • Monopotassium Phosphate (KH2PO4) (P) - 1lb/bag
  • Potassium Sulfate (K2SO4) (K) - 1lb/bag
  • Estimative Index/EI is a planted aquarium fertilizing system based on routine high dosing of dry micro (M) and macro (NPK) nutrients. The underlying principle is to dose more nutrients weekly than the aquarium plants require. This ensure that nutrients are in adequate supply without plant deficiencies; and algae growth in the aquarium is properly controlled through a balance of fertilizing, high lighting, a densely planted aquascape, and a stable CO2 supply (at 30ppm). During an EI dosing week, micros and macros are alternated daily for six days, followed by a 50% water change on Sundays to reset nutrient levels in the aquarium and remove excess nutrients.
  • Test kits / nutrient testing of aquarium water is not required with the EI system, although it is recommended to monitor CO2 saturation in your aquarium with a CO2 drop checker to confirm its at 30ppm.
  • It's easy to get started with EI routine fertilizing your planted aquarium. Follow the instructions outlined below and review our detailed Estimative Index instructions to make your aquascape a success with daily dosing.

KNO3 Guaranteed Analysis:

  • KNO3 13.7-0-46
  • Total Nitrogen(N) - 13.7%
  • 13.7% Nitrate Nitrogen
  • Soluble Potash(K2O) - 46%

K2SO4 Guaranteed Analysis:

  • K2SO4 0-0-52
  • Soluble Potash (K2O) - 52%
  • Sulfur (S) - 18%

KH2PO4 Guaranteed Analysis:

  • KH2PO4 0-52-34
  • Available Phosphate(P2O5) - 52%
  • Soluble Potash(K2O) - 34%

GLA EDTA Micromix Guaranteed Analysis:

  • Magnesium (Mg) - 1.5%
  • Chelated Iron (actual) (Fe) - 7.0%
  • Chelated Manganese (actual) (Mn) - 2.0%
  • Chelated Zinc (actual) (Zn) - 0.4%
  • Chelated Copper (actual) (Cu) - 0.1%
  • Molybdenum (actual) (Mo) - 0.6%
  • Boron (actual) (B) - 3.8%
  • EDTA (Ethylene diamine tetraacetate) - 65.4%

How to dose Estimative Index Aquarium Fertilizer Package in your planted aquarium

Customer Reviews

14 reviews

  • 5

    High quality aquarium fertilizer.

    Posted by Jason Osburg on 12th Sep 2022

    Switched from Niloc bags because those bags were just crap. The potasium at GLA is also much higher quality. Also GLA GH Booster is the best I have used, including Seachem. The GLA stuff is just super nice and fluffy. This EI kit will grow plants like crazy so get your scissors ready.

  • 5

    Really good deal.

    Posted by Seth McPherson on 11th Sep 2022

    Good deal on this kit. My tank is large so I have to dose EI I have no other options. Liquid dosing would be stupid expensive so I use this. This is my 4th kit from GLA and its always perfect.

  • 5

    Super happy!

    Posted by Trisha Willson on 11th Sep 2022

    Very happy with my new EI bags kit. This is a refill from my previous kit from a year ago although I was dosing PPS at that time. My tank is a fast growing duct tank and I use T5HO lights from TEK so its super high PAR and I felt it was time to start EI dosing. Its been a banger improvement. I do perform very large water changes on Sunday with this EI system and I feel it works better for my system than PPS. My plant load is massive and thick so I need a little extra of everything. The bags are very nice, they stand up and make it easy to dose daily without trouble. Love these bags!

  • 5

    Worth every penny.

    Posted by Bill Wallace on 16th Aug 2022

    I dont know why folks buy that liquid stuff. You can make gallons of liquid fertilizer with this alone. Use that fertilizer calculator and your set to go. If you cant use a calculator thats fill in the blank this product is not for you. If you want t grow plants to maximum ability on the cheap, this is for you.

  • 5

    Great planted aquarium fertilizer system.

    Posted by Ian Rashad on 31st Jul 2021

    Ive never used this type of fertilizer before. I always used liquid but felt my tank was always lacking so I gave this a try. I noticed improvement in only 3 days time. Dosing is easy and quite fun. My plants are much more happy and that makes me happy:)

  • 5

    Great Stuff

    Posted by Skewy on 13th Feb 2021

    Just started first week of e.I dosing and seeing some new growth good stuff

  • 5

    Full EI Dosing Ingredients at Great Price

    Posted by David M on 11th Dec 2020

    This is the "total package" for EI dosing, in re-sealable bags, at a great price.

  • 5

    E I. Fert set

    Posted by DougN on 29th Mar 2020

    As always, gla is rock solid. I have used these in the past with good success. Next Time though, I think I’ll spring for the jars instead of the packets.

  • 5

    Love GLA fertilizers

    Posted by Janelle Platt on 12th Feb 2020

    Fast shipping and super great service. This is my 3rd EI kit with GLA in the last 6 years, totally happy and always a return customer.

  • 5

    My plants thank you!

    Posted by Megan Short on 12th Jan 2020

    As a beginner I was very skeptical if I would be able to use dry fertilizers in my aquariums( I have 3). The first thing I noticed was how quickly my plants responded to using GLA fertilizers. After only a few days of dosing I was shooting myself in the foot for not going this route a year ago. I would have saved myself loads of money not buying these all in one fertilizers in premixed bottles. This is so easy to do and will cost you pennies compared to liquid dosing. If your just starting out dont hesitate to go with GLA fertilizers because its super easy. It also cost next to nothing compared to liquid fertilizers, what a waste of money.

  • 5

    EI Package

    Posted by Bruce on 9th Aug 2019

    This is the 3rd or 4th time I have ordered this package. I really keeps the plants healthy and growing. Always fast shipping and good communication. Good product & company.

  • 5

    EI package

    Posted by Robert Hoffmann on 18th Apr 2019

    Its definitely worth trying. My plants are growing like crazy. Even new plants act like nothing has happened and just start to grow and be happy. Im currently using co2 around 20ppm and everything is well balanced now. I was trying to use seachem products and they were not working very well at all for me.

  • 4

    Almost perfect bundle

    Posted by Jesse on 24th Mar 2019

    This is a great little bundle to get started with ei dosing. It includes macros and micros, as well as easy to follow dosing instructions on one of the bags. The only thing that could improve this bundle would be a set of measuring spoons, dosing for smaller tanks is as little as 1/32 of a teaspoon a day, it would be nice if tiny measuring spoons were included for these smaller ammounts. I used larger measuring spoons to make a dilution with water which works, but dry dosing is probably easier. Overall I would still highly recommend though!

  • 5

    EI pack

    Posted by Mike on 3rd Mar 2019

    Better packaging in black bags than the older clear bags. Ferts will keep longer.

Join the List