New 450L HiTech, plants' top whitening.Help - The Planted Tank Forum
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post #1 of 4 (permalink) Old 05-25-2018, 09:32 AM Thread Starter
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New 450L HiTech, plants' top whitening.Help

Hey.
So I started a 450L (6ftlong, 2ft wide, 15" deep) tank. Lit by 3 x Cree CXA 2540 at 75%. Pressurized CO2. Ista planted substrate as base covered with sand. Water Parameters are;
Temp at 27C-28C.
dGH:>21 (thats what my JBL proscan shows)
KH: 15
pH: 7
Nitrate:40ppm
Nitrite:0.5ppm
CO2: 35ppm

It's been 14 days and my plants after melting a lot has started to grow but most are growing white colored leaves that melt away or rot. I have started dosing CSM+B. I initially used 250gms of activated charcoal in the initial setup to lower the tannins from new spiderwood. I have removed that after 10 days but new growth is still the same. Any idea what could be wrong?
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post #2 of 4 (permalink) Old 05-25-2018, 09:46 AM
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It looks and sounds like a Fe issue but it could be many other things too.

How long have you been dosing csmb? Any idea what ppm Fe you're dosing via the csmb?

KH is really high. There's going to be a lot of plants that simply wont do well at that level. Many out there that will though, so you'll just have to do some research. Plant data bases like Flowgrow or Aquaticplantcentral are a good place to see KH requirements.

That's also a really high GH level. If Ca is really high it can interfere with the plants absorption of Fe and some other micros (K and P too) so you may have to dose higher amounts of these things to compensate

Also since you are showing some nitrite, the tank is still in its early stages as far as cycling goes. This can present a problem for plants in some cases, esp if the soil is leeching a lot of ammonia. Im not familiar with the substrate you mentioned but it might explain why there was some initial melt
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post #3 of 4 (permalink) Old 05-25-2018, 11:27 AM Thread Starter
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Ista soil usually has very low initial ammonia spikes unlike ADA. According to Rotala butterfly calc, I'm dosing 0.106ppm of Fe.
Is there no way to lower Gh/Kh other than water changes with RO?
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post #4 of 4 (permalink) Old 05-25-2018, 11:39 AM
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Quote:
Originally Posted by tanan View Post
Is there no way to lower Gh/Kh other than water changes with RO?
That or adding distilled water is really the only way


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