Question about dry fertilizers. - The Planted Tank Forum
 
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post #1 of 8 (permalink) Old 02-22-2009, 02:18 AM Thread Starter
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Question about dry fertilizers.

So i have the dry ferts that Rex uses(nitrate, potassium, trace+B, phosphate, seachem iron)

I've done the calculations for each fert and how much it takes to get into a certain range.

I have a test kit for everything except the traces+B and potassium. How often should i dose those since i can't tell if i'm lacking in them or not?

I guess can i overdose with them? I could shoot for twice a week or so.

The others i can just test to see if i need to add or not.
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post #2 of 8 (permalink) Old 02-22-2009, 02:23 AM
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Worse case scenario if you overdose them, you get algae. If you do, cut back.
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post #3 of 8 (permalink) Old 02-22-2009, 03:05 AM Thread Starter
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Worse case scenario if you overdose them, you get algae. If you do, cut back.
do you get algae with those nutrients though?

I suppose you would but it just seems like most algae they say too much light, excess phosphate...

Never really heard of algae from too much boron.
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post #4 of 8 (permalink) Old 02-22-2009, 03:15 AM
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I don't have much experience with ferts, but I have learned from threads on this site that a potassium deficiency will make itself apparent through the formation of small, pin-holes in your plants' leaves. If you notice these forming, it's a sure sign that you're too low in that particular macro nutrient.

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post #5 of 8 (permalink) Old 02-22-2009, 03:21 AM
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You stick to the EI dosing regime:

https://www.plantedtank.net/forums/wa...-regimes_.html

It is made so that you don't have to use test kits unless there's something going wrong in your tank. The objective of EI dosing is to supply your plants with enough of the nutrients and micronutrients that they need in order to outcompete algae, they is suppose to be more ferts added to your tank then your plants actually need. Algae shows up in order to compete for light, not nutrients from what I've read. In EI, there's weekly water changes that is there to make sure and help prevent the case of overdosing that you fear. As long as you stick to it, then you shouldn't fear.

Think about it though, there's nutrients in the water all the time in some very nice looking tanks.

Cause of algae is due to a few reasons:

1. Insufficient amounts of nutrients. This is one thing brought up about maintaining a balanced tank. To maintain one, you must make sure no nutrients bottom out and plants have enough of each nutrients. Any lack of nutrients might trigger the start of algae. Algae spores are already in your water, they're just waiting for the right conditions to start growing.

2. Fluctuating or not enough CO2. Keep your CO2 at around 30PPM or for drop checkers, keep the color to around yellow. Also note that sometimes, lack in CO2 is not always due to your diffusion method or how much you're injecting, but also how much flow you have in the tank. Flow helps carry nutrients and CO2 enriched water to all areas of your tank, if you lack that, then there might be dead spots that can trigger algae in some parts of your tank.

3. Too much light, not enough CO2. You can lower your wattage, lower the time it is on to about 6-8 hours, find a way to hang your light a little higher over your tank, or find a way to inject more CO2. The more light you have, the more CO2 you'll need, the more it'll take to keep your tank balanced (review #1 if u have to).
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post #6 of 8 (permalink) Old 02-22-2009, 03:26 AM Thread Starter
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Originally Posted by CAM6467 View Post
I don't have much experience with ferts, but I have learned from threads on this site that a potassium deficiency will make itself apparent through the formation of small, pin-holes in your plants' leaves. If you notice these forming, it's a sure sign that you're too low in that particular macro nutrient.
lol you're kidding me. Wish i knew that earlier. I noticed the other day a hole in my amazon sword that didn't look like it was anything made from fish.

My wendii have done this forever but i figured it was just the old leaves dying.

I just started my ferts up again last week after not using any for months.
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post #7 of 8 (permalink) Old 02-22-2009, 03:55 AM
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lol you're kidding me. Wish i knew that earlier. I noticed the other day a hole in my amazon sword that didn't look like it was anything made from fish.

My wendii have done this forever but i figured it was just the old leaves dying.

I just started my ferts up again last week after not using any for months.
Have you seen Chuck's "Warning signs of Nutrient Deficiency"?
http://www.csd.net/~cgadd/aqua/art_plant_nutrient.htm

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post #8 of 8 (permalink) Old 02-22-2009, 04:29 AM Thread Starter
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Have you seen Chuck's "Warning signs of Nutrient Deficiency"?
http://www.csd.net/~cgadd/aqua/art_plant_nutrient.htm

thanks for the link. From that i now know letting the tank go for months on end definitely lead to some deficiencies.

Although it was needed as the tank was spiraling out of control with algae a while back. Now that the algae became controllable i need to start focusing on the deficiencies i guess.

First on the list is phosphorous as i've always thought my plants grew slow. I had horrible diatoms which they say can be caused from excess phosphate so i've been worried to dose that since. But after looking at that list i'll give it a shot and see what happens. I'll just keep an eye out for algae again. I have a tester for that anyway now so i can just keep it within range.
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