Substrate question

Depends on how deep you want the sand. For a 2" deep bed, youll need about 135-150 pounds.

You can find some silica sand at a local hardware store and use that for your sand bed. Should only cost a couple bucks for a 40-50 pound bag.
 
I prefer playsand (home depot) 2 months ago, I changed from gravel to silica sand (menards) it look very nice at first, light brown color, but a few weeks later, dirt sets in even with weekly water change and vacuming... now a week ago I changed it to play sand, very nice... prolly in between medium and dark brown... we'll see in a couple of months how it's gonna look
 
playsand is most likely silica sand also. Unless of course you choose agronite. But that will boost your Ph and alk, and CA cichlids dont really like that.
 
i used a medium-sized, non-sandblasting sand from loew's in a 20L with no ill-effects...it was $4 for 50 lbs. that's economical right there. if you want a planted tank, you could mix it with something else and save a lot of money. the tank looks awesome-- i have live plants and didn't add anything but the cheap sand, but that tank also gets a ton of light (over 3w per gallon in a relatively short tank) and is slightly overstocked.

i plan on using this sand along with some sort of fertilizing planting mix when i set up my large tank in august and expect to spend less than $30 total on substrate.
 
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