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How important is a good substrate?

2K views 5 replies 6 participants last post by  hubbahubbahehe 
#1 ·
I started a new tank a couple weeks ago with various plants, but being my first planted tank I didn't know that it's a good idea to have some sort of substrate. It's a 15 gallon tank with 30w of light (14-15 hours of light/day), no CO2, Penguin bio-wheel 170.

My question is, would the plants still be able to grow in a bedding of small petstore gravel? The individual pebbles are somewhat small, but nowhere near as fine as sand. Any thoughts? I've been drooling over so many tanks here, and hopefully one day I'll have one looking similar.
 
#2 ·
My first and arguably best planted tank had a simple large-diameter gravel substrate. It was in a 29 gallon Eclipse tank, no CO2, no high-powered lights, and no fert dosing at all.

After a couple months, my Amazon was flowering like mad and I had to trim the Val and banana plant every week. This is the also the one planted tank that I never had an algae problem with, even though it housed three pepper corries, six platies, three angels, and three clown loaches.
 
#3 ·
This is another one of those topics that is hotly debated by hobbiests.

Its safe to say that "it depends"

Many undemanding plants will do very well in standard aquarium gravel, whereas others will not do very well at all without more nutrient rich substrates.

I have some tanks using river gravel (like my 22 Gallon) and others using cheesy epoxy coated gravel.. and even some with potting soil. I have managed to get plants growing very well in all of them, it just depends on the kind of plants.. age of the substrate itself (if its well seeded with mulm) and various other factors.
 
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