Dosing 75g medium light - The Planted Tank Forum
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post #1 of 3 (permalink) Old 09-08-2016, 03:37 PM Thread Starter
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Dosing 75g medium light

I purchased all the EI ferts before realizing that EI was intended only for tanks using Co2. I have Co2 equipment on the way but I wont be piecing it all together for a few months.
Currently I have about 200w of available LED light but I have them dialed back to about 100w totalish. I dose glutaraldehyde daily @ about 15ml right now.
What should I be running my lights at and how often/how much should I be dosing KNo3,KH2PO4 and CSM+b
I've read tom barrs Non co2 method but it isnt terribly clear with regards to excel dosing.
Any help appreciated, thanks
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post #2 of 3 (permalink) Old 09-08-2016, 03:40 PM
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This is entirely dependent on what kinds of plants you have / how densely planted your tank is. An abundance of healthy, growing plants will require and tolerate more light/ferts than a tank without many plants or unhealthy plants. From what I have observed over the past few years this is the #1 overlooked factor of this hobby.

In general you should start slow with light levels and ferts. IMO you should dose like 1/4 EI levels at the most until you have more plants / demand and notice that ferts might be a bottleneck. Probably even less than that. 2 anubias are gonna use a lot less ferts than a tank stuffed with anacharis that is growing like crazy. Use common sense here.

I know I say this to everyone but there are no magic levels of light and ferts that you need to use. There's no formula to say exactly the amount of light/ferts/co2/etc you need to be successful. Start slow and over time you'll figure it out.

One of the biggest mistakes you can make IMO is to blast a tank with light and ferts from day 1 and then a week later have an algae explosion. We've all been there and it sucks.

Owning a 75g myself I can say that they are NOT EASY to start out with plants. IMO you need to buy a ton of plants to make it as easy as possible to start out. Buy plants that grow quickly and are very easy to grow without a lot of hassle. Water sprite is my personal favorite. 75g has a large footprint so there is a lot light that isn't going to hit plants when you start out.

The problem is that you need to provide adequate light to grow the plants you have. Unhealthy plants only make things worse. BUT you need adequate plant coverage to make sure that the light is all used. I may be assuming you are sparsely planted with your new setup but from experience 95% of people who begin new tanks do not start with enough plants, use too much light and ferts, and struggle badly when they begin. Starting off with fistfuls of water sprite covering the bottom of your tank makes things a LOT easier.


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post #3 of 3 (permalink) Old 09-14-2016, 10:57 PM
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Quote:
Originally Posted by klibs View Post
I know I say this to everyone but there are no magic levels of light and ferts that you need to use. There's no formula to say exactly the amount of light/ferts/co2/etc you need to be successful. Start slow and over time you'll figure it out.

One of the biggest mistakes you can make IMO is to blast a tank with light and ferts from day 1 and then a week later have an algae explosion. We've all been there and it sucks.
This should be my new mantra: "There is no magic formula, I will not blast the tank with light. There is no magic formula, I will not blast the tank with light..."
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