Does gfo cause sps in mix reef tank

[picasso oscolaris]

my cali tort is losing a little color since using gfo. Does gfo cause bleaching*

 

[piranhapat]

It depends on if your phosphate were high and than you used GFO. Which might drop your phosphate very fast. So a quick change can. It's good to check your levels. So if your phosphate going up its time to change GFO so it's not a big swing. And if it's your first time possible using to much. Some brands are better removing phosphate in first 24 hours. So yes it can effect your SPS. Dropping it and possible bringing your levels to zero can bleach and effect some SPS more than others.

 

[MIKE NY]

X2...too quick of a change even for the better can effect SPS... It can also effect your alk and PH. ....always start with less than the recommended dosage

 

[picasso oscolaris]

thank you, very helpful

 

[Geraud]

You might be interested in reading this (the last part deals with the drop in alkalinity and pH). Apparently drops happen mostly with super-saturated (high alkalinity) aquariums.

http://www.advancedaquarist.com/2004/6/review

 

[picasso oscolaris]

thank guys, the article was helpful. My alk was high because of the gfo, that's why the bleaching occurring I think.

 

[BKLYNREEF123]

OP

IME GFO drops ALK levels.

 

[Geraud]

Yes, this is what you see in the article... GFO drops alkalinity especially if you have a high alkalinity level to start with.

The important thing is to always start slow with GFO (or any products that has an influence on water chemistry for that matter)