GH/KH and ferts - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 07-31-2014, 03:16 PM Thread Starter
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GH/KH and ferts

Average Tap water
Ph: 7.0
GH: 7-8
KH: 5

I ordered a Fert package from Nilocg and I am trying to digest all this information on EI fertilization.

From what I'm reading my GH/KH is fairly high on the tap water scale?
So my tank is a 40 Breeder and I'm gathering I need to dose the following.
KNO3 1.8 gm (approximately 1/4 teaspoons)
KH2PO4 282 mg (approximately 1/16 teaspoons)
Plantex CSM+B 1.2 gm (approximately 1/4 teaspoons)

I also have GH booster Contains 3:3:1(K2SO4:CaSO4:MgSO4). According to some threads an posts I see "1/2 Tsp-GH booster once a week". Does my tap waters high level of GH/KH change this ? Any help would be appreciated.
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post #2 of 5 (permalink) Old 07-31-2014, 04:32 PM
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I don't think you need to use any GH booster. GH of 7-8 should be fine.
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post #3 of 5 (permalink) Old 08-01-2014, 12:06 AM
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Quote:
Originally Posted by Rhenerie View Post
Average Tap water
Ph: 7.0
GH: 7-8
KH: 5

I ordered a Fert package from Nilocg and I am trying to digest all this information on EI fertilization.

From what I'm reading my GH/KH is fairly high on the tap water scale?
So my tank is a 40 Breeder and I'm gathering I need to dose the following.
KNO3 1.8 gm (approximately 1/4 teaspoons)
KH2PO4 282 mg (approximately 1/16 teaspoons)
Plantex CSM+B 1.2 gm (approximately 1/4 teaspoons)

I also have GH booster Contains 3:3:1(K2SO4:CaSO4:MgSO4). According to some threads an posts I see "1/2 Tsp-GH booster once a week". Does my tap waters high level of GH/KH change this ? Any help would be appreciated.

It depends upon the composition of your tap water. However, things should be good without adding any booster. Mainly, watch out for Ca or Mg deficiency....if so, then add a little booster just to make sure you have enough of both.

IF you need to add any booster it will only be for the water change water amount. You do not really want to just blindly add x-amount/wk.


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post #4 of 5 (permalink) Old 08-01-2014, 01:51 AM
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Congratulations on your dry ferts. Wise choice

Your dosing amounts are spot on for a high tech tank (high light and CO2). Your GH seems perfectly acceptable without any GH booster. That said GH is a measure of calcium AND magnesium. We don't know for sure how much of each you have. 99% of the time it's all good with that GH. If not it's usually deficient in magnesium. SO you have two choices essentially.

1) Go without GH booster and see what happens. This will usually work. If you see signs of deficiency decide which one. It will be magnesium 99% of the time. if so add epsom salt.

2) Add enough GH booster to raise GH 1-2 degrees at water change. Plants won't be affected at all by this. Some sensitive inhabitants can be such as hybrid shrimp or if you're trying to breeding various fish. If it's just plants and run of the mill inhabitants...no worries.

Which one is the right answer? IMO neither. It's a personal choice. Plants won't care either way. This is one question you have to consider the tenants of the tank.
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post #5 of 5 (permalink) Old 08-01-2014, 05:27 AM Thread Starter
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Current stock,

3 cardinal tetras (need more there seemed to be a shortage near me)
7 Neon tetras
5 kuhli loaches
5 otos
2 SAE's
6 rummynose tetras
2 GBR's
2 Amano shrimp
1 remaining ghost shrimp
And 1 bamboo shrimp

So start with the following??

KNO3 1.8 gm (approximately 1/4 teaspoons)
KH2PO4 282 mg (approximately 1/16 teaspoons)
Plantex CSM+B 1.2 gm (approximately 1/4 teaspoons)

Alternating KNO3/KH2PO4 with CSM+B for a 6 day cycle then 50%+ water change.


And when my plant load is higher and/or more red plants, start adding 1-2ml-Fe/Iron 10% chal witg the csm+b and keep an eye out for difficiencies that the GH booster would help with??
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