1. Why is live rock almost *always* kept in anechoic tanks at pet stores with no fish or other organisms in the tank to help kick start the nitrogen cycle, or keep it going? What is 'live' rock then supposed to feed off of? Other live rock? This to me seems like selling house plants from a room with no light.
I had to look up anechoic and I'm still not sure how it fit in that question [shrug]
Why would anyone in their right mind put fish in a tank with LR
that is for sale? When I worked at an LFS
, we used to bring in and sell a couple hundrerd lbs of LR
ina week, the rock we got from the wholesalers was rarely cured (btw
, thise of you buy "cured" LR
from the LFS
, unless they move it very slowly...don't count on it being cured). The die off from the rock was surely enough to feed a constant cycle in the tank. The disruption of taking LR
out and inspecting it before the customer would buy it, would be enough to stress the fish to death, fish in your rock tank is a bad idea IMO
2. Please explain how live sand in a sealed bag sitting on a shelf at room temps for months at a pet store suddenly becomes 'live' when it's immersed in a live aquarium? It would see to me the surface of Mars has more oxygen than a sealed plastic bag.
It can't. It's a waste of money, it may or may not contain bacteria for the nitrogen cycle, but it contains no critters, which IMO
makes it live.
What I'm baffled about is the belief that the amount of water circulation that occurs through several inches of dense sand is anything more than trivial. Without mechanical circulation, how can anything other than the first few inches of a DSB accomplish anything? How does water magically penetrate 4,5 and even more inches of sand substrate?
Diffusion is the common answer, but here is my solution...
Your sitting at the table with a plate of spaghetti in front of you. Unless a strong gust of wind comes along...your still hungry (unless you take action and pick up the fork and start eating). The bacterias food (which you do not dispute the existance of said bacteria) is in the water (just like the spaghetti is on your plate) the bacteria pass the water down the depths of the sand bed. Might not be completely accurat (heck it might be complete BS), but I like it