Kalk and Phosphate Precipitation

[sanababit]

I have read about people using kalk to keep up with cal and alk, but they also state that it precipitates phosphate, which in turn keeps it really low and not have that green film on glass every day, is this true???, does it really help keep the glass clean on our fish boxes??, please enlighten me people

I ask cause i use phosban or phospure and still get that green film every day, some diatom blooms and cyano every so often and i blame it on phosphate, nitrate is ~2ppm

sana

 

[m2434]

In theory calcium phosphate will result and the water has a low saturation point for calcium phosphate, so it shoudl begin to percipitate. To what extent this occurs is somewhat debatable, but IME kalk does seem to help somewhat.

 

[sanababit]

thanks m2434, does it keep your glass clean tough to some extent???

 

[m2434]

It seems to help a bit, but I have never seen or heard of a tank that does not require occasional cleaning. Also, you may get more coraline growth, which is much more difficult to remove :lol: