Plenum theory and practicality - Page 2

Witfull · 12-04-2003, 11:49 AM

i haven finished all the links in the threads, and for the life of me and wearing out google, i cannot find the pages i researched plenums on with the setup that i have. i thought it was Albert Thiel, but cannot find it. i guess mine is a modified plenum/DSB. alother grand experiment in Reefing. in the bow area of the tank its strickly DSB 4" deep. but in the rectangular area its the mod plenum. at 1" plenum, 3' sand mix.
we shall see......tbc

mojoreef · 12-04-2003, 12:15 PM

No matter Wit. Thier is nothing wrong with your system, it is what it is. Thier are so many modifications to so many different fitration systems only God really knows for sure

.
IMHO I would look at your system as a DSB system, with possibly a little better elemental replenishment. With your system I would make sure that you keep you areobic zone well oxygenated, as in dont reply totally on bugs, a gentle stir a syphoning of the detritus that comes from it will really enhance its working ability and will give you a longer life span.
I am not saying to syphon the sand (dont do that) stir it gently with your fingers (or anything really) and then have the syphon about and inch or so away to suck up the sludge.

anyway my friend thats what I would do.

Mike

Scooterman · 12-04-2003, 12:48 PM

I remember way back when I was FW, about 25 years ago I started a 20g FW set-up, it had an undergravel filter with course rubble bed & two inlets pumping air down there to create a suction forcing circulation through the bed. I had this one tank about 5 years when one day lost power, system upchucked & a big Crash! I then seen system pumping water creating a reverse flow through the bed but eventually the same problem occurred about the same amount of time. I eventually threw it all out & went to a vacuum method as I do now. That setup with a small canister filter went on about fifteen years without problems. I then merged to SW started with a 2" bed in a 30g, then merged to 100g tank with 4" to 6", after reading months in months went to a rubble base naked underneath. So I guess my point is, with any luck in ten years from now, I'll post the results!

jks1 · 12-04-2003, 12:59 PM

I have sort of a modified plenum in mine. This 29 has only been up for a few months, but i ran a 75 FOWLR in Calif for a couple of years with the same setup. I raised some eggcrate on 1" PVC pipes and covered w/ fiberglass screen. Added about 1 inch of caorse cc on top then 1" of LS on top of that. I ommited the layer of screen between the diff substrates.

Flatlander · 12-08-2003, 10:14 AM

Hmmm, I seem to recall something about that link also.

12-04-2003, 12:15 PM	#17 (permalink)
mojoreef Just a reefer Join Date: Nov 2003 Location: Washington State Posts: 1,176 View Gallery Karma Komment	No matter Wit. Thier is nothing wrong with your system, it is what it is. Thier are so many modifications to so many different fitration systems only God really knows for sure . IMHO I would look at your system as a DSB system, with possibly a little better elemental replenishment. With your system I would make sure that you keep you areobic zone well oxygenated, as in dont reply totally on bugs, a gentle stir a syphoning of the detritus that comes from it will really enhance its working ability and will give you a longer life span. I am not saying to syphon the sand (dont do that) stir it gently with your fingers (or anything really) and then have the syphon about and inch or so away to suck up the sludge. anyway my friend thats what I would do. Mike __________________ Make sure you check out The Fish Gallery The Coral Gallery The Equipment Gallery

12-04-2003, 12:48 PM	#18 (permalink)
Scooterman Elegance coral Join Date: Nov 2003 Location: Lafayette, Louisiana Posts: 1,210 View Gallery Karma Komment	I remember way back when I was FW, about 25 years ago I started a 20g FW set-up, it had an undergravel filter with course rubble bed & two inlets pumping air down there to create a suction forcing circulation through the bed. I had this one tank about 5 years when one day lost power, system upchucked & a big Crash! I then seen system pumping water creating a reverse flow through the bed but eventually the same problem occurred about the same amount of time. I eventually threw it all out & went to a vacuum method as I do now. That setup with a small canister filter went on about fifteen years without problems. I then merged to SW started with a 2" bed in a 30g, then merged to 100g tank with 4" to 6", after reading months in months went to a rubble base naked underneath. So I guess my point is, with any luck in ten years from now, I'll post the results! __________________ Scott Ardoin (Ard-Dwan)

12-04-2003, 12:59 PM	#19 (permalink)
jks1 Achilles Tang Join Date: Nov 2003 Location: Jacksonville, Fl Posts: 876 View Gallery Karma Komment	I have sort of a modified plenum in mine. This 29 has only been up for a few months, but i ran a 75 FOWLR in Calif for a couple of years with the same setup. I raised some eggcrate on 1" PVC pipes and covered w/ fiberglass screen. Added about 1 inch of caorse cc on top then 1" of LS on top of that. I ommited the layer of screen between the diff substrates. __________________ John Tank: 29g glass Pumps: Mag5.0 return - (3) rio 100 PHs Lighting: (1) 150w XM 10K/(2) 30W actinics Equipment: Aqua C Urchin skimmer- CPR Fuge, Titanium Heater -Red Sea wavemaster Pro Tank: 210g 1/2" Acrylic, dual overflows, 75g glass sump w/ 20g fuge. Pumps: Mag24 return - (2) MAG24s running 2 closed loop systems. Lighting: (3) 400w XM 10K/(2) Custom Sealife 96w PC - 25w dimmable incandescent Moonlight Equipment: Aqua C EV180 skimmer - CR500 calc reactor - Titanium Heater - AquaLogic single Stage Temp Controller - Aquanetics 1/5Hp Chiller - Neptune sys aquacontroller

12-08-2003, 10:14 AM	#20 (permalink)
Flatlander Bryozoan Join Date: Dec 2003 Location: Canada Posts: 46 View Gallery Karma Komment	Hmmm, I seem to recall something about that link also. __________________ Doug

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