Fertilizing help needed - The Planted Tank Forum
 
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post #1 of 11 (permalink) Old 12-25-2013, 02:23 AM Thread Starter
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Fertilizing help needed

Specs:
- 20g long
- medium lighting
- daily excel dosing
- 40ppm nitrates
- aquaclear 30

My question is this: how much should I be dosing according to ei? I have the ferts from gla and I found this website to help with ei dosing, but it is for high light and co2 tanks. I have decided to do ei because of bga showing up for some reason and my plants just aren't looking that good at all. Thanks for the advice.
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post #2 of 11 (permalink) Old 12-25-2013, 01:50 PM
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Quote:
Originally Posted by 7970 View Post
Specs:
- 20g long
- medium lighting
- daily excel dosing
- 40ppm nitrates
- aquaclear 30

My question is this: how much should I be dosing according to ei? I have the ferts from gla and I found this website to help with ei dosing, but it is for high light and co2 tanks. I have decided to do ei because of bga showing up for some reason and my plants just aren't looking that good at all. Thanks for the advice.
I'm just starting out and learning about the EI dosing which I'm currently doing, although I have Co2 and light to supplement it, I still proceed with caution by doing some test for the first week and see how fast the ferts are being used. I see that you don't have Co2 with medium lighting and nitrate is already at 40ppm, that means you can't dose the kno3 because you're at your limit. If youre heavily planted and feeding the fish you might not need the full dosing of EI except maybe once or twice a week and test for nitrates and phosphate before the beginning and end of the week before water change to see how much nutrients are used just to have an idea. I don't think dosing EI specifically take care of bga, it could cause more problems if you end up with more unused nutrients. On the other hand, if you have Co2, plants will use more fertilizers for faster growth and that will help. EI would be straight forward if you have high tech tank with a lot of plants.
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post #3 of 11 (permalink) Old 12-25-2013, 02:26 PM Thread Starter
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Oh. Sorry I forgot to add that I am going to be dosing excel.
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post #4 of 11 (permalink) Old 12-25-2013, 02:57 PM
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Oh. Sorry I forgot to add that I am going to be dosing excel.
I see that you dose excel but it's not the same as injected Co2. You can still do EI, maybe cut down on the dosage or few times a week. Like you said the way EI works is high tech with water change weekly reset. Without that guidelines, you can use it just adjust it a little till you find the sweet spot and see how your plants response.
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post #5 of 11 (permalink) Old 12-25-2013, 04:10 PM Thread Starter
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I see that you dose excel but it's not the same as injected Co2. You can still do EI, maybe cut down on the dosage or few times a week. Like you said the way EI works is high tech with water change weekly reset. Without that guidelines, you can use it just adjust it a little till you find the sweet spot and see how your plants response.
Should I avoid dosing the no3 since I have so much in my tank currently? Thanks.
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post #6 of 11 (permalink) Old 12-25-2013, 11:05 PM
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Should I avoid dosing the no3 since I have so much in my tank currently? Thanks.
I would skip it until it lowers down to maybe 5ppm then you can dose. You can dose k2so4 to get the potassium since you're skipping the kno3. I red extra k will not hurt the tank.
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post #7 of 11 (permalink) Old 12-26-2013, 04:45 AM
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What light or lights do you have on the tank, to get medium light?

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post #8 of 11 (permalink) Old 12-27-2013, 02:38 PM Thread Starter
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What light or lights do you have on the tank, to get medium light?
Finnex fugeray 30"
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post #9 of 11 (permalink) Old 12-27-2013, 03:45 PM
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I'd do about 1/3 EI and change the water more often for now, and later..... every 2-4 weeks after the tank grows in nice and is well established.

EI is meant for CO2 enriched tanks. The idea is to start high and then taper off slowly till you see a deficiency and a lull in growth rates. Better than starting too low/no dosing and having poor growth, stunting and algae...........then hoping the plants will recover.

With Excel, it's about 1/4-1/3rd the growth rate of CO2 enriched tanks.
So you divide by 3 or 4 to get a dosage for EI.

Easy modification.

Since the potential/possible build up over time is 3-4x less, you have a lot of wiggle room with regards to the water change % or frequency.
New tanks or algae issues: always do more water changes. 2-3x a week for 1-2 months. Add ferts after.




Regards,
Tom Barr
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post #10 of 11 (permalink) Old 12-27-2013, 05:35 PM Thread Starter
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Well since I don't have extremely small measuring spoons wish me luck with putting a tiny pinch of ferts in!
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post #11 of 11 (permalink) Old 12-27-2013, 06:24 PM
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Well since I don't have extremely small measuring spoons wish me luck with putting a tiny pinch of ferts in!
Dose solutions instead. Use this calculator to calculate the solutions. You'll have to play with it to learn but well worth the effort. Here is a solution for 1/3 EI.

Calculated for 20g. Mix each fertilizer in 500ml of water. Each dose is 10ml

KNO3 add 6.172g (1 1/4 tsp.) each dose raises NO3 1ppm
KH2PO4 1g (1/4 tsp.) each dose raises PO4 0.2ppm
Plantex CSM +B 4g (1tsp.) each dose raises Iron 0.07ppm

Dosing schedule
Mon KNO3 and KH2PO4
Tues Plantex CSM +B
Wed KNO3 and KH2PO4
Thurs Plantex CSM +B
Fri KNO3 and KH2PO4
Sat Plantex CSM +B
Sun Change 50% of the water (required for EI)

I suggest you read up on EI first. Here are two good references

EI light: for those less techy folks
Estimative Index of Dosing, or No Need for Test Kits
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