Yes DSB never get old.I am ones of the old,old timers from the days Of Lee Ching Eng and Robert Straughn,Steven Spotte.
Martin Moe,ect..I was 8 years old with my first reef tank by 12years old I was collecting in Florida when my parents would go on vacation and I would bring my tropical beauties back to Chicago.I am 55 now so you can do the math.
The question of a DSB vs Shallow is as simple as what you are trying to accomplish.If you wish a just pretty display tank then,there
are many combinations of systems that will work.Can be as simple as a skimmer and a dosser or even just powerheads.
If you are trying to keep,red ball and finger sponges,then deep sand bed will helpBUT THERE IS A CATCH!!!
Deep substrate beds still need some circulation/exchange to be fully effective,just like a zeolite system.I first realized this on neglected tanks of my own and in many pet shops.Everytime,the stores would get new systems and myself included the old ones sat unnoticed in the corner.
Months later to my surprise the life in many of these were flourishing beyond belief.Yes,the front glass would be clouded over with algae but when one looked down,sponges plants coral where flourishing.In almost all these systems the undergravel filters which back then just a plate with a narrow air uplift tube had either quite or close to it with just just a bubble a second or none.The hang on power filters had stopped completely and the water had evaporated some until the tank was half full,salinities of 1.026-1.028.Yet everything was growing enormously.
First thought is ohh man I got to clean this up!!!Yes,all of us even in the shops when I would point it out,would engage the undergravels,start up the power filters,ect..To the doom of everthing that was doing so well untouched.
It was always the same.Disabled or almost disabled undergravel filter.Plenum system with slight water exchange is what it amounts to.Circulation and exchange was through the uplift tubes.
It is the only way I have found to keep red ball and finger sponges growing and flourishing for years on end.Zooanthids make carpets all over the bottom.Why??? Now this is my assumption.I believe it is from the small amounts of sulfides and anerobic bacteria that get into the main tank from the plenum.Got that idea from the thermal vent studies in the ridges.
With vinegar/vodka once every 2 week,feeding is seldom necessary. There are no impellers to kill plankton fauna either.
I wish to mention also back then we did not use heavy lighting.People mostly used Grow-lux or a sunny window depending on what you wanted to accomplish.
Vinegar and Vodka actually was being used since the 70's by some marine biologists.I was introduced to it by a Man named Art who work at the Hiller's Garden Center in I believe it was Lockport,Illinois.
Even in the Oceans the sand beds and sediments are constantly on the move at one time or another.One only has to look or dive in high tide.
Sorry for the long winded story I was reminiscing!!! In fact I be setting up a little 20 nano this week,same system as above with zoo,mushrooms and of course sponges.
Post the pics as it progresses.
