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post #1 of 6 Old 03-03-2014, 04:18 PM Thread Starter
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minimum substrate depth

what is a minimum substrate depth for a planted tank ?

(i could have posted this in one of the other section, but worried about getting rule-of-thumb answers :(

i'm curious as trying to keep greenwater alive in the tank

my current tank has about 3" of substrate, ... i had greenwater at one time
i have heard leaving greenwater alone in a tank will cause it to crash on it's own
i had that exact experience, ... surei do things differently, i didn't want it to crash

i have a bucket about 5 gallons with dark greenwater i have left alone for months started in the spring actually, ... and it's healthy

no substrate in the bucket, no fish, no plants (so quite a few differences)

i had previously left the main tank alone for several months, ... adding new greenwater it lasted near a week before the water being clear again

otherwise (and since) the water takes about 2-3 days

my personal guess, ... something is eating/killing it ... that something (i think) is in the substrate

... that's a lot of hunches and guesses on my part :)

but to minimize what is going on, i am guessing, ... what's the minimum substrate level to get away with for rooting plants ?, ... i have previously found 2" (3" for heavily rooting plants)

would this sound like a respectable minimum ?, or would less be reasonable (in a low water flow tank, so not expecting the water flow to be knocking plants over, the fish are small & rather gentle on plants as well)
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post #2 of 6 Old 03-03-2014, 04:31 PM
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The only correct answer for the minimum substrate depth in a planted tank is

0.0" (bare bottom).

Being as you could have an algae turf scrubber or external refugium and a bare bottom tank.

That being said I use 3 one inch layers on my tanks.

my .02

maintain Fw and marine system with a strong emphasis on balanced, stabilized system that as much as possible are self substaning.

have maintained FW systems for up to 9 years with descendants from original fish and marine aquariums for up to 8 years.

With no water changes, untreated tap water, inexpensive lighting by first starting the tank with live plants (FW) or macro algae( marine)

see: http://www.tropicalfishkeeping.com/a...-build-295530/
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post #3 of 6 Old 03-03-2014, 04:55 PM Thread Starter
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i don't think that works, ... 0" substrate for planted tank means ... roots have no place to go.

unless they're potted, ... then those potted plants have a substrate depth in the pots (or whatever is being used.
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post #4 of 6 Old 03-04-2014, 02:15 PM
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Quote:
Originally Posted by Flear View Post
i don't think that works, ... 0" substrate for planted tank means ... roots have no place to go.

unless they're potted, ... then those potted plants have a substrate depth in the pots (or whatever is being used.

Psssst

the plants are not in the display.

maintain Fw and marine system with a strong emphasis on balanced, stabilized system that as much as possible are self substaning.

have maintained FW systems for up to 9 years with descendants from original fish and marine aquariums for up to 8 years.

With no water changes, untreated tap water, inexpensive lighting by first starting the tank with live plants (FW) or macro algae( marine)

see: http://www.tropicalfishkeeping.com/a...-build-295530/
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post #5 of 6 Old 03-04-2014, 02:27 PM Thread Starter
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the plants are intentional lunch for the herbivore fish
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post #6 of 6 Old 03-04-2014, 02:32 PM
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Most of the plants i have dont need any substrate- anacharis, hornwort, anubias, java fern. I do have 3-4" sand bed in all my tanks though.

"Be the change you want to see in the world."
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