phosphate question

[scapone]

I am having a lilttle algae problems I check my phosphates in my tank with a hanna checker there at 0. My rodi water when i test it is 0.02 and my tds meter always says zero. I am wondering where my algae problem could be coming from. I am running gfo and charcoal in separate reactors. nitrates are 0 test with a api kit. I will say this is a hurricane sandy survive tank so there were deaths in here although now my tank is restocked.

 

[Boomer]

Zero PO4 or NO3 does not mean no algae problems. What is your pH and Alk ? Algae and corals can suck the P04 and NO3 out of the water says fast as it enters the water showing zero. Slow / poor circulation and poor or incorrect lighting can also cause algae issues. Also, what kind of Alage is it ? Often no Algae or lots of it is some nutrient we have not figured out yet.

 

[scapone]

using salifert test alkalinity test dkh was 5.4 and alkalinity is 1.94 in meq. its green hair algae in certain spots. I had a dyno out break after hurricane sandy but that's gone now

 

[CHEMCHEF]

5.4 is way low. Usually between 8-11,12

 

[fishman1069]

5.4 is way low. Usually between 8-11,12

+1

 

[Boomer]

As pointed out your Alk is very low. Low Alk often fuels Algae growth, as does low pH to a degree.

1.94 meq/l

Natural Seawater is 2.25 meq/l. You need to get at least to that and more like 3.0 meq/l - 3.5 meq/l