substrate fertilizing with liquid ferts. - The Planted Tank Forum
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post #1 of 4 (permalink) Old 11-12-2015, 03:32 AM Thread Starter
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substrate fertilizing with liquid ferts.

I'm thinking about a large blackwater south American tank but would like to have it fairly heavily planted. I have been thinking about a deep substrate that is layered with a bottom layer of safe t sorb with a system of lines running through it so that I can dose my ferts to the soil and not to the water column. I'm just spit balling ideas at this time so what does everyone think. when I read up on blackwater species they keep talking about how low in nutrients the water is in these locales. has anyone kept a blackwater well planted tank using fert dosing? I'm just looking for ideas as this tank is probably at least a year in the future, but I am getting pretty wound up over a large planted blackwater tank even though it is at least somewhat of an oxymoron. feel free to give any and all advise. thanks, steve
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post #2 of 4 (permalink) Old 11-12-2015, 04:49 AM
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Tetra Tetra Blackwater Extract Aquarium Water Conditioners
I will admit that I haven't done much reading on those environments but the info on that extract seems to indicate it gives various minerals to the water. lower PH, that I have heard about the blackwater. I would check the KH regularly for the first two months also because I read on here that STS removes some of it.
I use both ferts and blackwater extract in my 10g tanks.
I feel that those lines going into the sub would not let you get any measurement on
how much got to what aria unless it was very complicated and each line separate.
Osmocote+ capsules placed as far down in the sub as you can get them will do a
better job of evenly distributing the nutrients. But use only as directed.

The shortest distance between any two points is a straight the opposite direction...
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post #3 of 4 (permalink) Old 11-12-2015, 05:19 AM
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If you are thinking in lines of a well-planted black water biotope then what comes into my mind is a Rio Negro biotope. It has been attempted before and I have come across it in one of the forums - about 10 years back - can't remember where exactly as I was a lurking visitor on many forums at that time trying to learn what others in the hobby were doing.

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post #4 of 4 (permalink) Old 11-13-2015, 01:43 AM
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I've just started something like you describe a couple of weeks ago, trying to breed otos.

Pure peat 2" substrate, capped with a skim of non-KH-raising sand. Plants and otos doing well, using PPS Pro dosing.

I used tank water from a KH5, pH7.5, TDS 150 tank that this one replaces. Each weekly water change will be pure RO, so diluting the original water. Doing it slowly so as not to shock the fish.

Don't plan on buffering KH, so feel free to follow along here to see if it works out:
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