I agree, a skimmer is important. However, I have not had time to install my sump and my big becket skimmer yet. I may just get a AquaC or something in the meantime.

No idea on the YWG. But I would say it would put some stress on him at the very least. I had a Checkerboard Wrasse that buries himself in the sand at night etc. Well when I went BB he was burying himself into a ball of Cheato I had in the main tank. It was a sad sight. I no longer have him because of the lack of sandbed. :(

That's too bad about your wrasse Chad. I don't want to put any stress on him.. I guess I may need to remove him if I really want to do this. I'll try over at RC and see what they have to say about YWG's and sandbeds.

:wink:

I was forced to remove the sand bed from my sump because I over-kalked and it had solidified! (nothing in the sump to turn over the sand..)

Anyway, I simply vaccuumed the sand out using a rubber hose....(and lifted the solid lumps out by hand!) While you suck out sand, you'll also suck out a lot of nasty stuff. IMO, there is no way that you could return that vaccuumed water to the system.

Just do a little bit at a time. In my case, I would remove 2 gallons of sand/water, then replace with 2 gallons of fresh SW. I did that once per week and it took about 6-8 weeks to remove all the sand.

As usual, the #1 rule is not to do anything too fast!

Thanks untamed.

The thing is , my tank is only 20g. So to empty the sand out, wouldn't take too, too long anyways. And I don't think I'd ever put the old water back in the system, doesnt' seem like a good idea at all.

Thanks again.

We went BB in our three reefs when we upgraded all three tanks almost two years ago. That meant we removed all the livestock from the existing tank, got rid of the sandbed so we could put the new tank/stand in place of the old tank/stand. Had lots of NSW on hand, but used quite a bit of the old water to fill the new tank. Rock from the old tank was swished in old tank water to remove detritus, and there was LOTS of it.

The sandbeds in each of the three tanks was 2-3" deep. Once everything was out of the tank, I stirred the sandbed really well with the remaining 2-3" of tank water. There was a raunchy rotten egg stench to the water after stirring. These were not what I would consider deep sand beds in the least, yet at least some of the bed had gone anoxic and had released hydrogen sulfide.

Because of the possibility of releasing hydrogen sulfide into your water column, I would suggest you take the time to be safe with your livestock if you go BB and tear down your tank to remove the sandbed. That way, you can get a very clean start, have new aquascaping, and be sure you won't have an unintended disaster on your hands.

Here's a new addition to the Reef Chemistry page on Hydrogen Sulfide and the Reef Aquarium:

http://reefkeeping.com/issues/2005-12/rhf/index.php


Personally, I won't go back to using sandbeds EVER!

I have even heard from the bigest supporter of DSB, Dr Ron, that the deep sand bed is useless if you do not have a sufficently sized aquarium. I forget the exact size that was suggested, but I believe it was atleast 50+ gal. The reasoning was that anything smaller could not sustain enough life to make the DSB functional. It made sense to me.

So, I went from a 20gal with DSB to the 50gal BB. I cannot begin to tell you the crap that was built up in my 20gal. It was thoroughly disgusting. So if you want to keep a sandbed in smaller tanks, you should have a smaller sandbed with lots of vaccuming for ditritus during water changes.

Just my 2cents, 2nd hand knowledge :-D

link
 

try the link now http://reefcentral.com/forums/showthread.php?threadid=392144&goto=newpost

when you siphon water, stick the end of the hose into the sand and it will suck up sand and water at the same time

i have a ywg in my sump that has a 4" dsb. he refuses to stay in the sand area and aways ends up in the other side of the sump without sand. it has been living there for about a year and will eat any left over foods that get into that area. i'm always expecting to find a dead YWG but its been a year and its still there. so as far as my fish is concern, it doesn't need sand but others may contradict this.

if you have fish that needs sand to bury into (wrasse) put a small 2-3" shallow container of sand under the rockwork where it will eventually find it and use it.

I remember reading that also,he was talking about the size of the sand bed needing to be large enough to support all the organizms to brake down detrius from the first step right through the Nitrification/Denitrifacation cycle.But even a small sand bed will help take nitrates out of the water,provided its the correct depth and grain size.But it needs to be kept clean.Or it adds to the Nitrate problem,rather than helping with it.

To switch to BB I would just take all water and everything out, and then empty out the sand.

IMO if you try and suck the sand out, it can bring up a lot of old detrius and what not and could cause a spike.

In your case, since it's only a 20g, I wouldn't hesitate to empty the tank out and start from scratch. If you're prepared and have everything ready, I can't see why it couldn't be done within a couple hours. What I would do:
1. siphon out as much water as you need to house the livestock temporary
2. transfer your livestock over
3. siphon the rest out into another container to be reuse
4. remove the sand
5. scrub down your tank (optional)
6. rebuild your reef

I have a BB fish only with about 70lb of liverock sitting on 1/4" glass and it seem do be doing just fine. The bottom is completely covered in coraline and it blends in very well the the rocks. IF you can carefully place your rocks in a secure manner I wouldn't bother with any other media on the bottom.