how long before changes i make are noticed?! - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 06-12-2014, 12:07 AM Thread Starter
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how long before changes i make are noticed?!

examples: adding dry ferts, more or less photo period, more freq wcs, added bio load.

I want to know if i change something drastic in my tank, in terms of my plants, how long to continue doing something before I should see the difference whether good or bad?

I been trying to get plants to grow really well and cut down the algae. I am on my second week with this fert dosing sched. would a month of this be sufficient to see if its working?

I want to keep trying different things till I get something that starts to show positive results. But I want to ensure I am allowing for enough time in between trying the different things.

75 Gallon Low Tech w/ Green Terror Pair
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post #2 of 4 (permalink) Old 06-12-2014, 01:15 AM
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A month should be sufficient time to correlate changes in plant health to changes that you have made (with respect to dosing, lighting changes, etc).

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post #3 of 4 (permalink) Old 06-12-2014, 01:51 AM
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Changing one thing at a time is a good, time tested approach that can be misleading with planted tanks, as cause and effect are not always intuitive.

As an example, adding fertilizers will not necessary lead to 'better' plant growth if the tank already has enough nutrients for for a given set of conditions. That set of conditions includes light intensity, availability of other nutrients, flow, temperature, and so on.

What helps to untangle this mess is the premise that plants are inhibited / limited by a *single* factor at a time. The challange is to find what that limiting factor is right now.

Understanding the chain of events helps to narrow the field down:

Light -> co2 -> Macros -> Micros -> Flow

Not enough light = plants will not have enough energy to use fertilizers, regardless of how much you dump in.

Enough light - short on co2 = same effect as plants need enough carbon in specific forms before they will need / can make use of / uptake other nutrients.

Enough light + enough co2 = could still = no growth if there is not enough of a *single* macro (either N or K or P). Not enough K = cannot use the extra P or K. (The approximate ratio of *total* available macros is 4:1:1).

And so the dependency / limitations chain continues, one limiting factor at the time.

Hope this helps a bit.

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post #4 of 4 (permalink) Old 06-12-2014, 01:59 AM Thread Starter
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thank you it does help a bit. I am pretty sure I have more than enough light for non c02 tank. I think thats all I am sure of atm...

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