View Full Version : Mixing different Size sands

01/25/2010, 09:36 AM
My 220 currently has a 1 1/2 sandbed of the fine (not sugar fine) aragonite sand from caribsea. What I want to do is add a layer of CaribSea Aragonite Seaflor Special Grade Reef Sand on top of that. I know that the bigger grains will stay on top but I had two questions.

First: should I remove any of my existing fine sand

Second: How much area should the 40lb bag of the Seaflor stuff cover?

lastly I do have some burrowing critters, if they bring up the finer grain sand will it eventually sink below the larger stuff?

01/25/2010, 10:47 AM
#1 - No... don't bother to remove any of it, but I would try to clean it with one of those siphon tubes.

#2 - 40lb bag? Depends on the dimentions of your tank. There is a sand bed calculator on the home page. According to this calc, 40 lbs is about 864 cubic inches. (using 80lbs as 1 cubic foot). If your tank is 20x20, that is a 2in deep sand bed. 20x40 in tank = 1in deep. It looks like you probably have at least a 72in tank though, and I'll be conservitve at 20in deep, so you are looking at less than a half in of sand across the whole thing.

01/25/2010, 11:21 AM
I just did the same exact thing this weekend. Ii used a big hose and siphoned the sand bed to clean it and whatever sand came along with it. I removed sand until I had about 50 lbs left. Then I slowly added rinsed seaflor special mixing the sand in with it. I used 2 40 lb bags. It looks awesome. You can really see the fine grain sand. The footprint of my tank is 72"x24" and left me with about a one and a half inch sand bed. Go for it!

01/25/2010, 12:24 PM
i think you'll be fine mixing sizes, I did the same with TropicEden sand. I don't think 40 lbs will be enough though. I'd say you'd be better off with 60-80 lbs.

01/26/2010, 11:21 AM
Excellent info, anyone else want to comment?

01/26/2010, 11:22 AM
oh and my footprint is 84 * 24