A take on BB methodology.

[bluebentgrass]

accurate? I don't know? precicse? very. A change in value of greater than -1 to a value of .5 or -1.5 calls for some serious church time
or time to try something else bb..
How are your nitrates and how often do you change your water and how much?

 

[bluebentgrass]

1.0 times 10 -26? how many ppm p04 does that correspond too?>

 

[Bomber]

You said the "best indicator" was redox. Tell me how to do it. Then tell me what to look for and what to do about it.

 

[bluebentgrass]

stick a tube in the sand insert a redox probe and measure the redox. A mature sand bed will read -400 and move to 0 at night. If you have a sand bed that read -100 andmoves positive at nightyou need to add more sand.If your sand bed doesnt move from -400 to 0 at night you need to vaccum.

 

[Bomber]

How accurate is that? Do you leave it in the sand from -400 until it's 0 at night?
Can you think of anything else that would cause that?

 

[bluebentgrass]

I leave it in the sand constantly! pushed all the way down to the plenum

 

[Bomber]

In the part that you just vacuumed? or in a part that you never vacuum? or do you move it around and how do you decide where to take a measurement from?

 

[bluebentgrass]

Inthe part never vaccumed but i am measureing the plenum water.

 

[Bomber]

How accurate is that? and can you think of any other reason to get those readings?

If you vacuum 25% of your sand bed, all the way down to the plenum, each month - How do you maintain a mature sand bed?

 

[Mojoreef]

Daaadummm Daaadummm Daaadummm......just trying to add some theme music here, rofl, boy I do mis these conversations sometimes!!

Is my site giving you some problems with the pics ??


Mike

 

[Bomber]

Yeah Mike, I get the "you can't right click on this picture" thing. What am I doing wrong??
Is that one of Chuck's sneeky things? LOL
(or did you take over a porn site? Don't you dare tell Alice I said that!) rotfl

 

[lduncan]

1.0 times 10 -26? how many ppm p04 does that correspond too?>

Don't know about you. But ignoring any common ion effect, i get around 2.4 x 10 -4 g/L = 0.24ppm?

What is the significance of this?

Layton

 

[bluebentgrass]

WHAT IF YOU INCREASE CA++ TO 400 PPM?? WHERE DOES THE PHOSPHATE LEVEL GO TOO?

 

[Bomber]

How accurate is that? and can you think of any other reason to get those readings?

If you vacuum 25% of your sand bed, all the way down to the plenum, each month - How do you maintain a mature sand bed?

 

[bluebentgrass]

You need to ask my corals that! Bacteria double every 30 minutes? Shouldnt take over a month and besides you are assuming my sand bed is at saturation. The redox swing disagrees.

 

[lduncan]

WHAT IF YOU INCREASE CA++ TO 400 PPM?? WHERE DOES THE PHOSPHATE LEVEL GO TOO?

You do the math. What happens when you find that phosphate, and phosphorous comes in more forms than calcium phosphate, then through a little bacteria in the mix, i'm not seeing your point, or where this is going.

Layton

 

[bluebentgrass]

I need to know how active the bed is that is how anaerobic is it and what is the velocity of water through the plenum indicated by the change in redox at night.

 

[bluebentgrass]

It doesn't matter if phosphorous is tied up as cap04 dust or bacteria when you vaccumm the sand bed you remove the po4 dust or bacteria which contain po4.

 

[G-money]

You can't effectively remove the biolfilm via siphon. That's where the majority is.

 

[lduncan]

It doesn't matter if phosphorous is tied up as cap04 dust or bacteria when you vaccumm the sand bed you remove the po4 dust or bacteria which contain po4.

What about the rest of it? Where does it go once you upset the bed?

Layton