27 inches tall - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 03-21-2018, 02:39 AM Thread Starter
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27 inches tall

What are my best options for 4" deep substrate. My tank is 109 x 40. So cost is an issue
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post #2 of 5 (permalink) Old 03-21-2018, 06:55 AM
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In my 24" tall I used about 2" of lava rock over egg crate and then about 2" of sand on top.

A 0.5 cu. ft. bag of lava rock will cover 3 sq. ft. at 2" deep and is about $4.
A 50lb bag of Tractor Supply Black Diamond is $8.
2 x 4" egg crate is about $12 ?
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post #3 of 5 (permalink) Old 03-21-2018, 12:14 PM Thread Starter
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Originally Posted by OVT View Post
In my 24" tall I used about 2" of lava rock over egg crate and then about 2" of sand on top.

A 0.5 cu. ft. bag of lava rock will cover 3 sq. ft. at 2" deep and is about $4.
A 50lb bag of Tractor Supply Black Diamond is $8.
2 x 4" egg crate is about $12 ?
Why the egg crate? Will such a deep layer cause debrey problems over a few years time?
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post #4 of 5 (permalink) Old 03-21-2018, 10:44 PM
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Originally Posted by david00061 View Post
Why the egg crate? Will such a deep layer cause debrey problems over a few years time?
To prevent lava rock from scratching the bottom, additional anchor for plants, hopefully less compaction if used with medium grain sand.

Over time, debris will probably accumulate. Fine grained sand will act as a barrier. Having bottom feeders like cories will help. Keeping MTS is another approach. Deep rooted plants will use debris for nutrients and will aerate substrate.

It's a balancing act between substrate depth, cost, debris accumulation, and anaerobic pockets.
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post #5 of 5 (permalink) Old 03-21-2018, 11:57 PM
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could throw some drainage cells / flow cells in there for support too
Atlantis 30mm Flo-Cell - Rainwater Collection and Stormwater Management

fill the flow cells with lava rock and cap everything with black diamond blasting sand, pool filter sand, or play sand. w/e your preference is.

if you want to you could also go with the layered substrate route:

cap of choice
soil / mineralized top soil
baked clay chips

https://www.advancedplantedtank.com/...te-layers.html


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