Light requirements for EI dosing - The Planted Tank Forum
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post #1 of 12 (permalink) Old 12-14-2017, 04:22 PM Thread Starter
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Light requirements for EI dosing

Is 150PAR at the top of a tank and 40PAR at the bottom enough light for EI dosing? I want to start with EI as it seems to provide a good balance of nutrients and is way cheaper than commercial solution. I use flourish excel as a source of carbon for my plants at the moment, would EI dosing be appropriate with my light and carbon setup?
Thanks!
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post #2 of 12 (permalink) Old 12-14-2017, 05:22 PM
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Maybe check out this article from Tom Barr...

Non Co2 Methods

Bump: Or this thread...

Non-Co2 EI Excel tank water changes


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post #3 of 12 (permalink) Old 12-14-2017, 07:56 PM Thread Starter
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Maybe check out this article from Tom Barr...

Non Co2 Methods

Bump: Or this thread...

Non-Co2 EI Excel tank water changes
Thanks for the help
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post #4 of 12 (permalink) Old 12-14-2017, 08:29 PM
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And it always pays to be aware of the name and what it says. EI is ESTIMATIVE, so it does mean that we are making estimates and exact results will vary.
Look at the plants, learn what they are telling you and then we may need to adapt things if needed? Nature has a way of resisting being put into neat little boxes.
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post #5 of 12 (permalink) Old 12-14-2017, 08:45 PM
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Quote:
Originally Posted by oscarlloydjohn View Post
Is 150PAR at the top of a tank and 40PAR at the bottom enough light for EI dosing? I want to start with EI as it seems to provide a good balance of nutrients and is way cheaper than commercial solution. I use flourish excel as a source of carbon for my plants at the moment, would EI dosing be appropriate with my light and carbon setup?
Thanks!
EI would be fine in your tank.
The amount of dosing would be key here.
You may only need 1/4 to 1/3 of a standard EI amount and maybe not 3x a week.

How heavily planted is your tank?


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post #6 of 12 (permalink) Old 12-14-2017, 09:06 PM
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It really depends on how many and what type of plants you have as well, not just the lighting. If for instance you have a bunch of slow growers like anubias etc., EI is probably overkill. Additionally as much as we would like to think of excel as an amazing alternative to CO2 injection, it is by no means equivalent. Limited evidence for how effective glutaraldehyde (and what it breaks down into) is at providing intermediates into the calvin cycle. I personally feel it is more of an algaecide than anything (this stuff is actually used as a fixative in labs because it can cross-link protein). I think if your going to dose anything near actual EI levels you should probably be running CO2 because in most cases without the CO2 your plants won't be up-taking that majority of the ferts you are dosing.

At any rate, you can dose EI, but probably scale it back a bit. I would suggest testing your nitrate levels once a week before each water change to see where they sit. If you have a huge excess, the plants aren't using that much and you can probably scale it back. If you start having algae problems, scale it back, etc...
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post #7 of 12 (permalink) Old 12-14-2017, 09:25 PM Thread Starter
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Originally Posted by Maryland Guppy View Post
EI would be fine in your tank.
The amount of dosing would be key here.
You may only need 1/4 to 1/3 of a standard EI amount and maybe not 3x a week.

How heavily planted is your tank?
I'd say medium to heavily planted. I have Amazon swords, Cyperus Helferi, Crypt. Lutea and Amazon frogbit. I'll upload a picture tomorrow as the tank lights went out an hour ago.
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post #8 of 12 (permalink) Old 12-15-2017, 05:58 PM Thread Starter
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Quote:
Originally Posted by Maryland Guppy View Post
EI would be fine in your tank.
The amount of dosing would be key here.
You may only need 1/4 to 1/3 of a standard EI amount and maybe not 3x a week.

How heavily planted is your tank?
Here is the picture My crypts are looking unhappy at the moment as they are new and I think they are getting used to the excel (cryptmelt maybe?) The amazon swords also have a potassium deficiency hence my idea to switch to EI.
https://ibb.co/eFaj5R

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post #9 of 12 (permalink) Old 12-16-2017, 12:16 AM
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Have you looked into NilocG.com "Thrive" may be a good all in one fert option?


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post #10 of 12 (permalink) Old 12-16-2017, 09:37 AM Thread Starter
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Have you looked into NilocG.com "Thrive" may be a good all in one fert option?
I don't think it's available in the UK. I found a full EI kit for £20 at aquariumplantfood.co.uk which seems easy to do and has good value for money. Ei Starter Kit - Starter Kits - Dry Chemicals - Fertilisers Do you think this would work with maybe half dosing? I appreciate your help
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post #11 of 12 (permalink) Old 12-16-2017, 11:56 AM
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I don't think it's available in the UK.
One of my biggest issues here, location!
Recommending a product, shipping plants etc...

Maybe dose to reach 10:1 NO3:PO4, use equivalent micros.
Monitor how quickly it is used up? Nitrate or phosphate test.
May only need a once a week dose after small WC.

Full EI in a lo-tech tank will just create a huge excess of ferts.
EI is intended to provide unlimited nutrients then we have to focus on lighting and CO2.
In your case lighting is already known and fine, dosing of Excel for carbon is okay.
I rate Excel more as a mild algaecide but it works.


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post #12 of 12 (permalink) Old 12-16-2017, 12:10 PM Thread Starter
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Originally Posted by Maryland Guppy View Post
Maybe dose to reach 10:1 NO3:PO4, use equivalent micros.
Monitor how quickly it is used up? Nitrate or phosphate test.
May only need a once a week dose after small WC.

Full EI in a lo-tech tank will just create a huge excess of ferts.
EI is intended to provide unlimited nutrients then we have to focus on lighting and CO2.
In your case lighting is already known and fine, dosing of Excel for carbon is okay.
I rate Excel more as a mild algaecide but it works.
I've ordered it alongside root tabs but I might wait until my CO2 system arrives before I actually start using it. Thanks for the help once again
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