GFO Question

[epleeds]

How much would u put in a reactor for 250 gallon system. And how often do u change it out.

[lnevo]

I change every 6 weeks. I follow the brs directions. I started at 1/2 the recommended and increased to full over 2-3 media changes.

[surf&turf]

How low are you trying to get your phosphates and what are they now?

[epleeds]

Never tested for them. I just know when the GFO is expended, I get more algae build up on the glass. I normally run two cups In a reactor and change it out every three weeks. Just wondering if that's enough or if I need more or change it out every two weeks.

[surf&turf]

If your coral color is good, you are probably spot on. I run a cup on my 90 and was changing it every 2 weeks. My phosphates were down to 0.003 so I've been letting them increase a little and the SPS are coloring back up.

So far its at .028 so I'll probably change mine over the weekend. This will be 4 weeks since I changed mine. Natural seawater runs around .050

[gmerek2]

I quit mine for a couple weeks as an experiment and the tiny spot of GHA expanded to other rocks lol I got it back up and running quick. Keep her goin good

[Gadgets]

You should buy a Hanna phosphate colorimeter. Otherwise you have no idea of where you are, where your going and if your there. I use about 1.5 cups for a 93g cube and change when needed. Usage will vary per tank so change schedule will vary as well.

[epleeds]

K. Will look into one of those. Also do u run it in a reactor or in a filter bag in the sump.

[BowieReefer84]

He just sold me the phosphorus meter... haha

[epleeds]

He just sold me the phosphorus meter... haha

Yea I know. It looked real familiar when I looked it up on amazon.

[Gadgets]

I could be wrong but I'm pretty sure u want the Hanna PHOSPHATE Checker not phosphorous.

[Gadgets]

Also, running it in a fluidized reactor is best. Just needs a very slight tumble.

[BowieReefer84]

you want phosphorus, not phosphate...  origami can explain it better than I can.

 

This is a good explanation:

Edited September 6, 2013 by BowieReefer84

[Origami]

Better resolution with the Phosphorus ULR meter. Better in the range that we test. There's a conversion to get to phosphate but it's easy. I think that there's a chart available that I posted here somewhere.... I'm on my phone though. Maybe somebody can find it?

 

Sent from my phone

 

 

[Gadgets]

you want phosphorus, not phosphate...  origami can explain it better than I can.

 

This is a good explanation:

 

WOW!!! Great info. I did not know this. Thanks

[lnevo]

Very interesting...never knew about this...

[Origami]

Here's the thread with the chart

 

http://www.wamas.org/forums/index.php?/topic/54085-Lookup-Tables-for-Hanna-Checkers

 

 

 

Sent from my phone

 

[BowieReefer84]

Good call on finding that thread.  I searched, but couldn't.  I need to print another copy of that chart out.