dosing/fertilization with my light level... - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 05-01-2015, 08:53 PM Thread Starter
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dosing/fertilization with my light level...

I've been treating my 40g breeder as a medium light tank. it has 2 finnex stingrays on it, I don't have a PAR meter but from my research it seems like the average PAR is about 30PAR at 18"; so with 2 I'm thinking there's probably around 60PAR at 18".

1) is this correct? I've been acquiring plants based off the medium light assumption...

2) I'd like to start dosing excel and possibly flourish; is it ok to just dose these 2 things? I keep seeing calculations about adding dry fertilizers of various kinds along with these 2.

I'm pretty lost in terms of fertilization...
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post #2 of 5 (permalink) Old 05-01-2015, 09:58 PM
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Originally Posted by brooklyngal View Post
I've been treating my 40g breeder as a medium light tank. it has 2 finnex stingrays on it, I don't have a PAR meter but from my research it seems like the average PAR is about 30PAR at 18"; so with 2 I'm thinking there's probably around 60PAR at 18".

1) is this correct? I've been acquiring plants based off the medium light assumption...

2) I'd like to start dosing excel and possibly flourish; is it ok to just dose these 2 things? I keep seeing calculations about adding dry fertilizers of various kinds along with these 2.

I'm pretty lost in terms of fertilization...
Hi, I also have a 40B I have 2 BML lamps over my tank around the same distance to substrate. I've used a dimmer and set mine to 30 PAR front and back. I use a modified EI dosing regiment.
I dose 5ml flourish comp on day 1
day 2 1/4 tsp potassium sulfate 1/16 tsp mono potassium phosphate and 1/8 tsp potassium nitrate with 3 ml seachem iron. I also dose 3 ml of excel each day.
I also run pressurised Co2 I'm not sure if you are or just going to do excel.
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post #3 of 5 (permalink) Old 05-01-2015, 10:10 PM
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Originally Posted by brooklyngal View Post

2) I'd like to start dosing excel and possibly flourish; is it ok to just dose these 2 things? I keep seeing calculations about adding dry fertilizers of various kinds along with these 2.

I'm pretty lost in terms of fertilization...
If by Flourish you mean Flourish Comprehensive, that contains a full range of micros (trace elements, and Fe) but that's it. You will still need to provide all the macro nutrients - nitrogen, potassium, and phosphorus. A heavily stocked tank with well fed livestock *may* provide enough nitrogen and phosphorus, but potassium will soon be lacking.

I suggest you read up on using dry ferts, they are exponentially cheaper than buying premixed brands. Here is a good thread to get started - https://www.plantedtank.net/forums/sh...d.php?t=517945

Here you can get probably a year and a half's worth of everything you need for $15 + shipping. It comes with dosing instructions. Since you will doing Excel only, no real CO2, just start with ~ 1/3 of the recommended amounts. http://greenleafaquariums.com/aquari...rtilizers.html


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post #4 of 5 (permalink) Old 05-02-2015, 01:57 AM
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If you do have 60 PAR at the substrate, you should also be using pressurized CO2. Excel is very good for lower light levels, but is very unlikely to be adequate for a well fertilized 60 PAR lighted tank. When you are providing inadequate carbon for the plants, or letting the supply of carbon change from day to day, you will be very likely to find yourself becoming an expert in treating BBA infestations, and believe me no one enjoys going through that learning process.

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post #5 of 5 (permalink) Old 05-02-2015, 05:52 PM Thread Starter
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I'm aiming for a low maintence tank, which I'm hoping I haven't messed up. regardless, I'm going to use excel as an algacide to counter some green hair/thread algae that came in on some plants; I'm noticing it start to spread when for the 2 weeks prior to these plants there was 0 algae. the tank is almost ready to be stocked though so I'll be picking up some amano shrimp and hopefully find some true SAE.

I'm going away for 2 months in the summer (end of june till end of august), hopefully will be able to come back at the end of july for 2 days and give the tank a little love. my dad will be watching the tank, I'm hoping to have gotten into a groove by then with the tank so I don't need to stress too much.
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