acroporas' tentacles used to be longer and the tip starting to bleach out, currently I am using 400 watts hamilton ballast and 14k bulb and the other one is 400 watt PFO with xm 20k bulb they are both 3 months old bulbs.

that is why i asked

so are you running any carbon??


it is a lot tougher to keep a tank with both SPS and softies and i think running carbon is a must in these tanks.

You can also allow your kH to drop to 7.0 - 8.0. That's closer to NSW levels.

What are your other water parameters? Mg, K+, etc?

1 1100 seems like a very low amount of flow in a 90g my tank is 48x24x28 so just a bit bigger than an average 90 and im in the 8000-9000gph range of flow and it seems to be just right for my needs.
if the softies are blowing all over the place what kind of flow is coming from your return? and mabey its just the placement of either the corals or the powerhead

I'm going to guess it is your bulbs. Acro's need more intense lighting. XM 20Ks are poor performers when it comes to PAR.

J

just add my other powerhead tonight:smile: but I realized that my pendants are only 5-6inches above the water and all my sps pretty much only 12inches under my pendants; isnt it too close to the pendant? how far do you guys usually have yours? thanks for helping out guys:wink:

[quote=a4twenty;337570]that is why i asked



so are you running any carbon??

yes I am running carbon.