Dr Reddy's ppt slides on wetland sediments

Nice read; I'm going to have to toss my self back into understanding ORP better. While a decent bit of it is still foggy in my head, this paper helps to clear things up. The chart on the bottom of page 8 really helps to make sense of things.

-Philosophos

 

I don't have an ORP meter hanging around, otherwise I'd be playing with it night and day right now.

The only purpose I've seen to heating cables is consistency of temperature. I've used them on occasion along with the old ceramic jagger heaters that existed before eheim bought the company out. I've found the temperature in these tanks is far more precise, which is great for controlling gender ratios at hatch time.

To be honest, I'm not sure where the argument for using heaters comes from on a scientific basis. If anything the substrate should insulate, meaning it's just going to effect tank temperatures and when the heaters switch on and off anyhow. The temperature at the substrate shouldn't vary in any meaningful way from the column, especially not when it's all of 50-75w compared to the 150-400w heaters on an average tank.

-Philosophos

 

Orp?

Hi Philosophos,

Found zero interest here concerning ORP.

I suspect it is who brings it up.

As you told me no one is interested in the science, I should not bother.

If you are interested pm me, I might be able to help you out.

Biollante

 

If nobody were interested in science, this would be a very sad hobby. It's definitely the few who want to get into the mess of working out precise science from nature.

What are you offering to help out on? ORP or heating cables?

-Philosophos

 

ORP Meter

Hi,

I should add that Dr. Reddy’s power point presentation is excellent. The activity that occurs is amazing.

I have been using ORP meters for quite a while now, principally a cheap pH/ORP pen.

I now have a much better set up. Though I did not go the route of the lab grade or industrial probes, I did opt for the ‘fermentation’ probes, which should hold up to use in substrates and have some ion specific probes as well.

The tricky part is not contaminating the thing you are measuring. My original use was with my little aquaculture setup, then the hydroponics, they rather go together.

I know it is a form of blasphemy here, but I even like looking at the water column, it is fascinating. I am looking forward to one probe left in the water column in a heavily planted tank; I have gotten readings that I would have thought bordered on oxygen toxicity.

Sometime, I think in early November, I am going to make a lot of this available online.

I spent some time (did I mention money?) with a couple of engineers and some folks from a local university and they have a couple of things going that I think are interesting miserable wretch that I am.

I am having a couple of monitoring arrays made for some long-term observation (two plus years). The arrays are principally capacitive, should give us some vector information.

I have never been a fan of submerged heater coils and I believe Tom Barr is correct in thinking that they do little to prevent oxygen starvation and/or improve circulation through the substrate.

Though none of the studies I am subsidizing is going to directly deal with heating cables, one along the way will involve heating and cooling various substrates and should give us some sort of indication.

Oh well.

Biollante