Lighting Question

[a4twenty]

Originally Posted by reefy

ahh I am currently using one seio1100 just took the other one out (I was using 2) cuz I realized that is too much flow for a 90gallon

why do you feel that is to much flow?

most would say a 40x turn over rate ( 90G = 3600 gph ) is a minimum for keeping SPS. my tank is a 120 ( 6" wider than a standard 90 ) and i have 5220 gph ( 43.5x turn over ) and it doesn't look like there is to much flow.

as pointed out above water quality is very important and so is lighting and flow, i would double check all your params and increase your flow, to start.

[sphelps]

Agreed, having 5 SPS requires just as much tank flow as 20. I have 130 gallon which runs A dart closed loop and a dart return as well as a nano-stream 6055 and I still find myself short on flow. Not saying that's the problem but it's something to think about. SPS corals can usually handle one type of stress but it's the combinations that really show effects. Basically you may be looking at multiple causes.

[reefy]

well what happend is that just took them out cuz I thought that causes my acropora to streess. I thought it had too much flow because my soft coral were swerving like crazy and my sand were flying everywhere eventhough I face my power throw the surface. one more question; How far can I face the powerhead directly to the coral? do they do well if I face it towards them?
sorry for all these question I am new in SPSs.
thanks in advance.

[Jason McK]

It's possible your soft corals are fighting with chemicals causing your SPS to die.

When you say they are not doing well. What exactly is the problem?

20K lighting depending on your Ballast and the bulb type my not be enough light. Same with the 14K. PAR ratings on these high K lights can change drematically based on the ballast.

J

[reefy]

Originally Posted by Jason McK

It's possible your soft corals are fighting with chemicals causing your SPS to die.

When you say they are not doing well. What exactly is the problem?

20K lighting depending on your Ballast and the bulb type my not be enough light. Same with the 14K. PAR ratings on these high K lights can change drematically based on the ballast.

J

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.

[a4twenty]

Originally Posted by reefy

I thought it had too much flow because my soft coral were swerving like crazy

that is why i asked

Originally Posted by a4twenty

how much and what types of coral do you have? any chance another coral is to close? are you running carbon?

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.

[albert_dao]

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?

[i have crabs]

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

[Jason McK]

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

[reefy]

just add my other powerhead tonight 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