I was always under the impression that aragonite DSBs deteriorate at approx the rate of 1/4" to 1/2" anually. If this sand is replaced anually refreshing the DSB, there seems to me, no problem at all
This seems like alot of deterioration. i was under the impression that aragonite acted as a buffer if the calcium levels went below what the inhabitants of your tank demanded. sort of like a calcium reactor. so if that is true then as long as your dosing the correct amounts of Ca
then this deterioration should slow significantly.
If something was to develop a toxic layer of gas it would be the plenum since the entire concept of one is to intentionally create a space that is nearly void of water flow.
esentually isn't that the same thing that the DSB
is doing is creating that same void of water flow except using a more natural environment via the sand instead of an eggcrate. i was under the impression that the DSB
worked in many ways much like the plenum in that it created a nutrient sink underneath the sandbed where the "nasties" of our tanks would slowly migrate. so with that being said i know many stores in my area of central illinois that have been using plenums for some 13 years with no problems.
Myself i am a firm believer in the DSB
and i think that it is a very good attempt at recreating a more natural environment. Is it perfect? no. But at the same time we do not have millions of gallons of volume, along with millions of lbs of LR
and whatever else makes the natural ecosystem that we try to recreate. however i think alone the DSB
could be a "timebomb" if used alone. i believe with the addition of Macro algaes and a healthy refugium to keep the microfuana population healthy then the life of your DSB
could ultimatly go well beyond what many people have predicted to be a mass destruction of our tanks.
with that being said i am in no way anywhere close to as knowledgable as most on this forum. the views that i express are my own ideas from the vast readings that i have seen. and for those of you who do read about this know that it is very difficult to find two authors that completly agree on the type of filtration to be used in our tanks. that is what i believe makes this hobby so unique in that each and every one of us is able to form our own unique environment that cannot be duplicated by anyone else. so as for saying what will work and what won't work, what will last and what won't..... only the owner of each individual tank can be the judge. and as someone said before in 10 years from now there will probably be something that makes the DSB
and the Plenum obsolete. but that is what makes science and discovery so great. sorry for rambling but i think this is a very interesting topic to discuss