Diatoms and Cyano again

[donniea1800]

Hello,
I currently have a 50 gallon FOWLR tank that is about 6 months old. I initially went through the diatom, followed by green algae, and followed by cyano stages. I kept up my maintenance and everything cleared up and was looking great. Within the last week I have been getting diatoms and some cyano on the sand again.

. The only thing that has changed is recently i added some new live sand and a couple pieces of live rock. Could the sand and rock have fueled the diatoms and cyano? I assume if this is the case it should clear up on its own.
50 gallon FOWLR
skimmer
HOB filter
Ammonia - 0.0
Nitrite - 0.0
PH - 8.2
Nitrate - 0.0 - 0.1
Salinity - 1.024
Temp - 80 degrees
Stock:
1-coral beauty
1-ocellaris clownfish
1-six line wrasse
1-green coris wrasse
1-pink spot goby
1-bicolor blenny
1-midas blenny
Inverts:
-various snails and hermits
-2 cleaner shrimp
-pistol shrimp
-brittle star
Thanks!

 

[beaslbob]

Kill the lights and stop adding food and see if it clears up.
then resume with less lighting and feeding so it stays away.
I would also add macro algaes or an algae truf scrubber to help starve out the uglies.
my .02

 

[donniea1800]

Ok. Thank you. By the way waht do you think of my current stock? Am I overstocked or at my limit? I dont plan to add anything else.

 

[beaslbob]

Quote:
Originally Posted by donniea1800 http:///t/395447/diatoms-and-cyano-again#post_3520694
Ok. Thank you. By the way waht do you think of my current stock? Am I overstocked or at my limit? I dont plan to add anything else.
Sounds good to me.
my old 55g had more and larger fish. but most would say you're at least at your limit. but then I also had an in tank refugium to balance out and stabilize operations.
my .02

 

[snakeblitz33]

New sand can cause some new diatom issues, since some live sands have a certain amount of silicate available for use. Cyano, though, is a flow and nutrient problem. There's too much detritus building up in areas. Add a little extra flow, kill your lights for a few days, stir the sandbed when you do a couple large water changes. If you have a sump, add some macroalgae. If you don't have a protein skimmer, add one to your system.
Then again, usually once a cyano problem get a hold, there's very little you can do to make it go away. I've had to add red slime remover to my tank just once - and it hasn't come back again,... because I added more flow, added macroalgae, and did a couple large water changes after treating the tank.
Good luck!