Apparent plant deficiency, or something else... But which? Orwhat?

dw1305

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LadyDay

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One more question and I'll stop taking up so much of your time :)
Can I add a weeks worth of the DTPA at once, once per week right after the water change? Or is it significantly better to dose it every day?
I would like to use up the 5 liter canister of the expensive Tropica fertilizer that I've already started and don't have 3 pumps (TSN, KNO3 and Fe DTPA), only two.
 

Zeus.

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Good point! Hopefully the salts from APFUK will work when I add some of the right iron chelate to it?

I'm on about you using your KNO3 and KH2PO4 salts you got from APFUK to boost your NO3 and PO4 levels in addition to usings your Tropicia Specialised Plant nutrition ;)
 

LadyDay

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I'm on about you using your KNO3 and KH2PO4 salts you got from APFUK to boost your NO3 and PO4 levels in addition to usings your Tropicia Specialised Plant nutrition ;)

Aaaaaah. Then I understand. Thanks for all the help. You've gone over and above. :happy:
 

LadyDay

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Hi guys.

It's gotten much worse!
I've doubled the amount of KNO3 I got suggested here, yet the plants have still deteriorated a lot. The older, original leaves on the Hygrophila are also affected now and all the newer growth is pale. My Limnophila sessiflora has turned brown, except for the new growth tips. So, I've concluded they must be lacking Magnesium and started adding MgSO4, in a concentration according to the recipe APFUK give with their starter kit. My water has 110 mg/l Calcium, but only 11 mg/l Magnesium, so 10:1, not 4:1.
Now the Fe DTPA I ordered has finally arrived, so I've dosed that today too. I am also dosing KH2PO4, along with the KNO3, with some time between it and the Fe.
Do you think I'm on the right track?
How long do you think it will take before I start seeing the effect of the Magnesium, if that is indeed lacking?
Do you think the plants can recover?
The photos are not showing the colors completely according to real life. The Limnophila is browner than they look and the paler leaves on the Hygrophila are paler than they look (it also has some older leaves that have gradually turned brown. You can see it in the photo. Today the worst affected older leaves also have a lot of tiny green dots.).
I now have Frogbite to the tank, which is on the light green side and slow growing, but otherwise healthy.

So, fertilizer overview:
  • Tropica Specialised Nutrition - 6 ml/day. My original, inadequate, fertilizer.
  • Solution of 50 gr/l KNO3 and 12 gr/l KH2PO4 - 11 ml/day. Have been adding this since May 16th.
  • Solution of 12 tsp/l MgSO4 - 30 ml/day. Have been adding this since May 26th.
  • Solution of 50 mg/l Fe DTPA - 2,5 ml/day (Not added at the same time as the KH2PO4. I'll wait 6+ h in between them.) Started adding it today.
Cheers :)
 

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jaypeecee

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Hi @LadyDay

PS. Don't trust hobby grade tests, the main reason they exist is to get out of you as much money as possible.

Whilst a few manufacturers' specific test kits are unreliable and some parameters cannot be accurately measured, there are some 'hobby-grade' kits that are worthy of consideration. I use a few JBL test kits, for example. I also use test kits made by ITS (Industrial Test Systems) and Hach - many of their kits are aimed at the aquatics/aquaculture market but I trust them.

JPC
 

LadyDay

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Better photos of the plants.

Oh, and I understand if I'm asking a bit too much. :)
 

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