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View Full Version : PH 8.6 to kill bryopsis & red algae?


DamageInc
01/21/2006, 02:17 PM
How effective is keeping ph at 8.6 day and night to kill bryopsis and red cotton ball algae? How long should I keep it up and will it harm my corals and fish?

The bryopsis & red cotton ball like algae is driving me crazy. I do water changes of at least 20% per week, hand pick the algae with pumps off then run a hot magnum to pickup any floating stuff. My cpr bakpak 2r skimmer was hardly pulling any gunk out I expect because the algae was sucking up the nitrates and phosphates before the skimmer could.

I do feed freeze dried krill to my dendrophyllia at least 2x per week and frozen mysis shimp to the rest of my corals 1-2x per week.

I have a 40g w/ 1 pink bar goby, 1 lawnmower blenny (who does nothing for the algae problem!) 1 peppermint shrimp and a 2-3 astrea and nerith shalls and 2-3 mexican red leg hermits.

I also have a hob refugium with some mangroves and chaeto. The chaeto is starting to be overcome by the red cotton like algae.

I like to feed my corals but this algae is killing me and I have to feed the dendro.

Thanks for any help.

Randy Holmes-Farley
01/21/2006, 04:16 PM
I do not think raising the pH will have much effect on most forms of algae. A better effort would be to reduce nutrients like phosphate. Iron may boost the macroalgae relative to the microalgae.

These articles may help:

Phosphorus: Algae’s Best Friend
http://www.advancedaquarist.com/issues/sept2002/chem.htm

Nitrate in the Reef Aquarium
http://www.advancedaquarist.com/issues/august2003/chem.htm

First Iron Article: Macroalgae and Dosing Recommendations
http://www.advancedaquarist.com/issues/aug2002/chem.htm

Second Iron Article: Iron: A Look at Organisms Other than Macroalgae
http://www.advancedaquarist.com/issues/oct2002/chem.htm


Iron Oxide Hydroxide (GFO) Phosphate Binders
http://reefkeeping.com/issues/2004-11/rhf/index.htm

ri
01/21/2006, 04:18 PM
I've not noticed any decrease in undesirable algae resulting from increased pH.

ri

DamageInc
01/21/2006, 04:57 PM
Thank you for the replys. I could have swarn I read somewhere that this would help.

Randy Holmes-Farley
01/22/2006, 07:20 AM
I don't doubt someone was claiming it. :D

You're welcome and good luck!

mordibv
07/26/2011, 09:32 AM
I've not noticed any decrease in undesirable algae resulting from increased pH.

ri


old post

HighlandReefer
07/26/2011, 01:54 PM
Very much possibly a coincidence, unless you are raising your pH level above 8.5 for quite some time and even then I have not read any research that causes increased algae growth at high pH levels. ;)

Higher pH has more effects on cyanobacteria than algae. :)