Go Back   Aquarium Advice - Aquarium Forum Community > Freshwater > Freshwater & Brackish - General Discussion
Click Here to Login

Join Aquarium Advice Today
Reply
 
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
 
Old 01-20-2013, 03:06 PM   #1
Aquarium Advice Addict
 
dmolavi's Avatar
 
Join Date: Jun 2012
Location: Sewell, NJ
Posts: 2,123
phosphate removal

I have started noticing brown algae is spots of my tank...did a quick check and sure enough, phosphates. Since I do weekly PWC, whwt is the next best way to control them? Phosguard?

Also, on a 56 gallon tank, are additional circulation pumps recommended, besides the flow from my 2 HOBs pushing 400gph?
__________________

__________________
20 gallon nano-reef torn down to make way for the 40B Reef (original thread and current update).
dmolavi is offline   Reply With Quote
Old 01-20-2013, 03:50 PM   #2
Dividing by 0
Community Admin
 
fort384's Avatar



POTM Champion
 
Join Date: Nov 2008
Location: Illinois
Posts: 13,926
What level are your phosphates at? Is this a planted tank? How are you lighting the tank? What are you feeding and how often/how much?
__________________

fort384 is offline   Reply With Quote
Old 01-20-2013, 06:27 PM   #3
Aquarium Advice Addict
 
dmolavi's Avatar
 
Join Date: Jun 2012
Location: Sewell, NJ
Posts: 2,123
Phosphates are around 0.5-1.0ppm (based on API test). It's very lightly planted with some Amazon Sword and 3 other plants (that I can't recall ATM). Tank is lit with a 24" PowerGlo fluorescent tube @18000K. I'm feeding flake food once daily, about 1 - 1 1/2 tsp (it's all gone within 60 seconds).

I'm filtering with 2 HOB filters @200gph each, with floss and carbon in each. One also has 50 micron microfiber, the other has 2 100mL Purigen pouches. Water is crystal clear
__________________
dmolavi is offline   Reply With Quote
Old 01-20-2013, 06:48 PM   #4
Dividing by 0
Community Admin
 
fort384's Avatar



POTM Champion
 
Join Date: Nov 2008
Location: Illinois
Posts: 13,926
I would cut back feeding a bit - feed 2 out of 3 days or so. That will help bring the PO4 down some. You want somewhere around 0.5 if you plan to keep plants, so you aren't far off. I wouldn't recommend running any additional chemical filtration until you try cutting back the feeding a bit.

Lighting is a little on the high side color temp wise, you are missing some red peaks in the spectrum that plants need with a color temp that high. Probably not an emergency situation, but next time you replace the bulbs, I would bring it down to 6500-10000K.
fort384 is offline   Reply With Quote
Old 01-20-2013, 07:23 PM   #5
Aquarium Advice Addict
 
dmolavi's Avatar
 
Join Date: Jun 2012
Location: Sewell, NJ
Posts: 2,123
I'll try that on the feeding.

As for the lamp, the color spectrum is attached; looks OK in the reds, but I will check a lower temp bulb next time around.

Also, what about circulation? Are the 2 HOBs enough (run aft to fore in the tank), or should I add a lateral powerhead to make sure no dead zones are present?
Attached Thumbnails
Click image for larger version

Name:	spectrum.jpg
Views:	43
Size:	46.4 KB
ID:	145769  
__________________
dmolavi is offline   Reply With Quote
Old 01-20-2013, 07:26 PM   #6
Dividing by 0
Community Admin
 
fort384's Avatar



POTM Champion
 
Join Date: Nov 2008
Location: Illinois
Posts: 13,926
I think you are fine with just the HOBs.

There are some reds on the lower end, but a ~6700K bulb is going to have peaks in the reds with higher wavelengths above 700, and also less on the blue end.
fort384 is offline   Reply With Quote
Old 01-20-2013, 07:29 PM   #7
Aquarium Advice Addict
 
dmolavi's Avatar
 
Join Date: Jun 2012
Location: Sewell, NJ
Posts: 2,123
Awesome, thanks. I'll keep an eye on things and see how it goes (I track everything in my tank in a pretty detailed spreadsheet, so I should be able to see the change, if any, fairly quickly once it happens).
__________________
dmolavi is offline   Reply With Quote
Old 01-20-2013, 07:31 PM   #8
Dividing by 0
Community Admin
 
fort384's Avatar



POTM Champion
 
Join Date: Nov 2008
Location: Illinois
Posts: 13,926
Excellent, let us know.

If the reduced feeding doesn't bring it down, there are some chemical options out there... but you are so close, I wouldn't resort to it yet. PO4 is removed usually via granular ferric oxide (GFO), which is not cheap.
fort384 is offline   Reply With Quote
Old 01-20-2013, 07:33 PM   #9
Aquarium Advice Addict
 
dmolavi's Avatar
 
Join Date: Jun 2012
Location: Sewell, NJ
Posts: 2,123
Yeah, I don't want to have to resort to a GFO reactor (tank isn't drilled, so I would have to create a siphon powered sump...which I am very leery about).

PhosGuard seemed to be the next best option, as I have always had success w/ SeaChem's products. I will do my weekly PWC tomorrow and start the new feeding regimen tomorrow as well. Time shall tell
__________________
dmolavi is offline   Reply With Quote
Old 01-20-2013, 07:37 PM   #10
Dividing by 0
Community Admin
 
fort384's Avatar



POTM Champion
 
Join Date: Nov 2008
Location: Illinois
Posts: 13,926
I think phosguard is just low grade gfo. Gfo could be run in a bag in your HOB.
fort384 is offline   Reply With Quote
Old 01-20-2013, 07:39 PM   #11
Dividing by 0
Community Admin
 
fort384's Avatar



POTM Champion
 
Join Date: Nov 2008
Location: Illinois
Posts: 13,926
Also check your water source. Local water sources can sometimes contain low levels of phosphates. Especially if you are in a rural area or farming community.
fort384 is offline   Reply With Quote
Old 01-20-2013, 08:09 PM   #12
Aquarium Advice Addict
 
dmolavi's Avatar
 
Join Date: Jun 2012
Location: Sewell, NJ
Posts: 2,123
Good call..I haven't checked the tap. I plan on getting a RO/DI for an upcoming SW build, so I could always make the switch.
__________________

__________________
dmolavi is offline   Reply With Quote
Reply

Tags
phosphate, val

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off








» Photo Contest Winners







All times are GMT -4. The time now is 05:06 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2020, vBulletin Solutions, Inc.