400 gallon project

[untamed]

Originally Posted by Delphinus

Just out of curiousity (and apologies if you've answered this before) but do you plan on replacing the sand at any kind of interval?

Without trying to open up too much debate on this topic, I'm sort of torn, for my 280, I want the benefits of a clean BB tank, but I like the look of a sandbed (at least when it's nice and clean). But I have to admit that there's no way that over the typical lifespan of a reef tank that I'm going to keep up with weekly vacuuming and whatnot. But then again, I don't want the sand for filtration, I just want it to look like a sea floor and not an aquarium floor.

I don't plan on replacing the sand. Further, it would seem that I will NEVER have to vaccuum the sand bed ever again. The tank is BB at the back and the sand varies in depth (depending on the mood of the Gobies) from less than 1" to over 4". At this depth and movement, I don't think the sand bed is providing any kind of anaerobic filtration.

The gobies have achieved the (almost) perfect compromise. Their downside is that they tend to place sand on top of the display rocks from time to time. This can bury a coral and do a lot of damage fast. They don't do it all the time, and I think that it is a breeding behaviour that causes them to suddenly decide to build a new mountain. (more on that later)

For me..I dislike the look of BB tanks. I was prepared to live with the sand as dirty as it was. Now, it is beautifully clean, but I have to pay a bit more attention to turkey basting than I used to and lower placed corals are at risk of being buried.