dreaming reef gravel??

[iceman86]

Originally Posted by asylumdown

it's entirely possible that this gravel is leaching phosphate.

If you want to test it, take some if your gravel, put it in a sealed 5 gallon bucket, and fill the bucket with R/O water and put it somewhere dark. Test the water immediately after filling, then again every couple of days for a week.

I've also heard you'll get a more 'true' reading of the phosphate that's actually in the water if you heat it up to 80 degrees C before you test it. Supposedly it causes some of the bound phosphate that might be available to plants but invisible to the test kits to decompose, though plant available phosphorous is a surprisingly more complex and difficult to account for parameter than you probably would think (seriosuly, google the Hedley Fractionation Method to get a sense of just how far scientists have to go to measure plant available phosphorous).

That's a good test, I'm gonna give it a shot. I know my water is good cuz it's rodi with all new filters And I'm getting a 0 TDS reading. I only started running my phospates reactor after the first sign on algae and I tested it for phosphate and got 0.25. Next day I was down to zero with the reactor but algae still kept growing

[asylumdown]

yah even then I'd take those readings with a grain of salt. I have recently done a tremendous amount of research in to phosphates for some soil analysis stuff I need to do for my masters. It's pretty epic, not at all like nitrate which is a straightforward, water soluble compound. Phosphate can either be organic or inorganic, and within that there's like 3 dozen different forms it can take depending on what it's bound to. On top of that there's an ongoing and dynamic process of conversion between many of the forms on a pretty constant basis, and many of the forms it can take are available to plants, just in varying degrees.

The process for testing ALL of the labile (ie, plant available) phosphorous in a sample of soil takes an entire week of running sequential fractionations in a lab with dozens of different acids, reagents, resins, etc, so it's a safe bet that the single shot, one or two reagent hobby grade test kits that we use only give the tiniest picture of what's actually going on from a phosphate point of view.

If you've got out of control algae growth, and your nitrate tests are showing zero, chances are good you've got phosphates that your test kits simply aren't sophisticated enough to pick up, or it's being consumed as soon as it's produced.

[iceman86]

Ok so its been almost a week that the sand has been sitting in rodi water. I just tested for phoshates and it came out as 0-.25 but id guess about .05 by the color (api kit).

What I did notice which was strange was, I used a syringe to withdraw the water and then I squirt the leftover back into the cintainer. It created a bunch of micro bubbles that rose to the surface of the water and have been sitting there for about 20 minutes already. Looks like the water has thickened in order to hold bubbles.

I also went back to aquagiant today and noticed they have 2 different types of sand in there aquariums. Some had the same sand as mine and looked just like my tank atm. The other tanks had fine sand and that was covered in cyano.

My rock from my old tank doesnt have any brown diatoms on it and my new marko rock has a little bit.

I do understand that its normal for a tank to go through a diatom bloom but this isnt just a diatom bloom if I fought it in my old tank for over a year.

Any ideas?

Ill try to get a pic of my sand

[baker_jeff]

Crap. I am setting up a new tank right now with the same sand. We'll see how she does :S