Planning RO reminerlizarion ph,kh,gh Flora and Fauna considerations - The Planted Tank Forum
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post #1 of 4 (permalink) Old 08-12-2019, 07:30 PM Thread Starter
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Planning RO reminerlizarion ph,kh,gh Flora and Fauna considerations

I have:
Crowntail Betta (ph 6 - 8, gh 1 - 15, kh(?)
Neon Tetras (ph 4 - 7.5, gh 1 - 12, kh(?)
Espei Rasboras (ph 5.5 - 7.5, gh 1 - 10, kh(?)
Nano Pleco (ph 5 - 7.5, gh 1 - 15, kh(?)
Otocinclus (ph 6 - 7.5, gh 2 - 10, kh(?))
Red Cherry Shrimp (PH: 6.47.6, KH: 25, GH: 68)
Amano Shrimp (ph 6 - 8.5, kh 1 - 10, kh 5 - 15)
Clithon Nerite( ph 7 - 7.5, kh=2-5 - 12, gh=6-15)
Zebra Nerite (ph 7 - 8 , kh=5 - 12, gh=7-15)

These values were taken from the best source I could find all over the internet and really none of them are the biotope range but simply the 'general range'.

Plants:
Staurogyne Repens, Hygrophila Pinnatafida, Bucephalandra Red, Bucephalandra Wavy Green, Anubias Nana Petite, Pogostemon Erectus, Rotala Rotundifolia, Ludwigia Palustris, Ranunculus Inundatis, Eleocharis Mini, Taxyphyllum Spiky.

Right now fish and inverts are happy eating aggressively and active(ph=6.4 - 6.5(24/7), gh=8, kh=5), RCS hide a lot but I see some out and about and don't seem stressed, Amanos are very active. Clithon Nerites show a little shell rot but not all of them and Zebra Nerites seems fine.

Not all plants are fine and that is why I am switching to RO water but the question is to what kh and gh should I go to?

For plants I think I will have less problems keeping the kh <2 and preferably 1.
It seems the nerites will not be so happy with lower kh/gh and ph ~6, possibly its low for the RCS shrimp as well. The fish seem well covered as long as the kh is at least 1.

I had planned on remineralizing to kh=1 and gh=4 what do you all think?
Another possibility is kh=2 and Gh=6-8 which would generally be best for neos and for the nerites although possibly not best for the plants.
Or Kh=1 Gh=6 which may be a compromise for all.

Any thoughts?


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post #2 of 4 (permalink) Old 08-12-2019, 07:36 PM
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kH 1 gH 6-8 would get my vote.

Ca 20-30ppm and Mg 5-15 ppm or so + ~1dkH should be the common ground for your livestock and plant selection.
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post #3 of 4 (permalink) Old 08-12-2019, 07:52 PM
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If your fish/inverts are happy and your plants are not, I would say you'd do better looking at your fertilisation routine than your water. You're nothing too extreme either way and should be able to grow plants ok.
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post #4 of 4 (permalink) Old 08-12-2019, 08:40 PM Thread Starter
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Quote:
Originally Posted by tamsin View Post
If your fish/inverts are happy and your plants are not, I would say you'd do better looking at your fertilisation routine than your water. You're nothing too extreme either way and should be able to grow plants ok.
I may have too much Copper and Boron in my water, also trusting the municipal water report is somewhat suspect.
I have tried too lean (Tropica Specialized), Excess (EI through thrive), moderate PPS-PRO and have settled in the middle 1/2 PPS-PRO.
I just can't keep throwing darts at a board hoping to hit a bullseye I want to control everything and really nail down ideal ferts.

Plants do grow okay, see my journal but I beleive I can do better.

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Quote:
Originally Posted by Quagulator View Post
kH 1 gH 6-8 would get my vote.

Ca 20-30ppm and Mg 5-15 ppm or so + ~1dkH should be the common ground for your livestock and plant selection.
28 Ca2+ (CaSO41/2H20) and 9 Mg2+(MgSO47H20)would give me ~3:1 Ca:Mg and 6GH that could be a plan. (But its a little disconcerting as that isn't far off from what I have now).
I'd also likely use Sodium Bicarb for the 1dkh which would give me 8.2ppm Na which I could live with.


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