Sponge power

[juannnn]

Do you know if SP expires once opened? I know that zeobak and biomate lose efficacy between 3 and 6 months, is that correct?
Thanks...

[juannnn]

Shouldn't it feed the corals somehow? Just the light will be enough? Thanks Alexander

[juannnn]

I do not have cyano, I use a refractrometer for salinity but I have checked it with one of the hanna digital brand and it works perfectly

[juannnn]

I already have my icp but I don't see it very clear, especially in salinity because I make changes with sea water and it is at 1028 and here it gives me 1025. Everything comes out more or less normal. I don't understand then why my corals can be like this. I have lowered the kh and it seems that they...