Fertilizing - not EI - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 05-02-2014, 05:41 PM Thread Starter
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Hi everyone.

I have been using the EI method of fertilizing with decent success in my low light tank. I have been using the petalphile calculator and dosing for the EI low light/weekly method. My tank is a 29 gallon shrimp tank and I would love to scale back my water changes to way less than 50% a week


So what other fertilizing methods are there?

I ask because the way I am doing my water changes at the moment is not very efficient. I use RO water which comes out cold, and I use 3 five gallon buckets for my water change and have only a single 50w heater on hand to get those buckets to match my tanks temp. (well, close)

I guess I could go out any buy a water holding container and add an air stone and heater so the water is ready right out the bat, (and finally add an auto shut off) but that will cost some moolah. My wallet has become rather limited due to my wedding in a month (and someones lack of staying under budget)


So I figured maybe I could just change the way I fertilize my tank so that I dont have to do such large water changes. I think it would be fun to learn another way to fertilize anyway



All opinions welcome

Last edited by Darkblade48; 05-03-2014 at 04:02 PM. Reason: Please use the edit function for back to back posts to keep threads cleaner
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post #2 of 3 (permalink) Old 05-02-2014, 06:08 PM
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I by no means have experience with shrimp but from what I know many of them are delicate to water changes.

What temp are you trying to hit? I just let mine sit to room temp and then change the water. I am guessing that is not viable for you?

It is funny you should ask this question, I was just recently reading up on the topic here:

http://www.barrreport.com/showthread...on-CO2-methods

The point of water changes in a low tech setup, from my understanding, is removing excess nutrients/waste, and adding CO2.

I have never tried anything that would allow me to go without a water change. I did go almost a month once without a water change, not by choice. Everything survived but I also got a massive algae outbreak (but that as also caused by over-feeding).


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post #3 of 3 (permalink) Old 05-02-2014, 08:58 PM
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EI is much more of a concept than a specific dosing method. The basics behind it are:
A reasonable excess of any of the basic nutrients does no harm.
If all of the nutrients are available in at least the minimum concentration needed by the plants, the only thing that will be left to limit the plants growth rate is light.
If you do regular big water changes none of the nutrients can build up in the water enough to cause any harm.

You can follow the tables in the write-ups for EI dosing, and know if you do about 50% water changes every week, the highest concentration of any of the nutrients will be limited to twice what you dose between water changes. But, you can also do some experimenting with the dosage amounts and end up with just a little more than needed, so you can stretch the time between water changes to every two weeks or even every month. Or, you can reduce the size of the water changes from 50% down to 25% or maybe even less.

It is up to you to adjust the dosage amounts to fit the needs that you have, but you do need to do the experimenting first.

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