CCP's 2000 gallon Deltec reef tank

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It might be cavitation. If the pump doesn't get enough pressure (or head) on the suction side, that will happen. Try a less restricted suction (like larger diameter pipe), or throttling down on the output.
 
all good thoughts, and make sure (if you haven't already) that all those unions are properly threaded and seated. Is the input line 1.5"? Hard to tell from the pics but it looks like 1" to me.
 
<a href=showthread.php?s=&postid=13219136#post13219136 target=_blank>Originally posted</a> by centipede
It might be cavitation. If the pump doesn't get enough pressure (or head) on the suction side, that will happen. Try a less restricted suction (like larger diameter pipe), or throttling down on the output.
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the available volume of water MUST be more than the pump's rated discharge, hence using larger diameter piping on the intake side.
 
<a href=showthread.php?s=&postid=13220752#post13220752 target=_blank>Originally posted</a> by chainsaw5vent
the available volume of water MUST be more than the pump's rated discharge, hence using larger diameter piping on the intake side.
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Yup, this has happened to me before. Some make sure you oversize the input.
 
The other leaks you might want to inspect for is around your flex line connections. It wouldn't take that much of a pin hole for it to suck air through. I know flex line is good to work with in some applications, but in my IMO I don't trust the stuff. Movement and vibration over time weakens those joints very easily. Again IMO. I have also seen it happen.
 
<a href=showthread.php?s=&postid=13244529#post13244529 target=_blank>Originally posted</a> by CaveManNOhio
The other leaks you might want to inspect for is around your flex line connections. It wouldn't take that much of a pin hole for it to suck air through. I know flex line is good to work with in some applications, but in my IMO I don't trust the stuff. Movement and vibration over time weakens those joints very easily. Again IMO. I have also seen it happen.
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Agree. I don't have a good feeling about them and they didn't glue very well either.

It's been very busy lately but I plan to do some tests with all of the suggestions here and hopefully fix it.

The tank is still cycle'ing and ammonia is at 1.0 mgr/L when I checked yesterday. The No2 is still 0 so I might need to introduce more livesand to get things rolling but there is no need to rush ;)

I haven't cycled quite so big before and never with so much dry rock.
 
I don't have a good feeling about them and they didn't glue very well either.
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Are they actual flex PVC, or some kind of blend? There are a lot of different kinds all called "Spa-Flex" but some are not made with enough PVC. The ones with PVC are not nearly as flexible. I can post a pic of the difference if you want.
 
It's the right kind of hose for glueing but I meant it didn't glue as well as the pipes did. At least it didn't hold as well or maybe I was doing it wrong ;)
 
What kind of glue did you use for the spa flex?

I would expect the bubbles to be from cavitation even if you can't hear the pump actually cavitating. Do you have any 90* connections, a long distance, any height, or tight bends on the intake side of the pump? Maybe a strainer that you could remove?

I went so far to avoid cavitation on my current tank that I bumped the size of the lines up to 1" even though my pump connections are 3/4".
 
I don't know if anyone asked this yet, but is the webcam housing easy to remove? Once algae starts to bloom it will be tough to keep clean and you will also need to make sure you don't get coralline algae growing on it.
 
<a href=showthread.php?s=&postid=13247300#post13247300 target=_blank>Originally posted</a> by ToeJam
I don't know if anyone asked this yet, but is the webcam housing easy to remove? Once algae starts to bloom it will be tough to keep clean and you will also need to make sure you don't get coralline algae growing on it.
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It's very easy to lift out of the water since it's attached to the light bracket and that is on a pulley system. I will have to see how easy the coralline algae will be to control on the dome.
 
<a href=showthread.php?s=&postid=13246099#post13246099 target=_blank>Originally posted</a> by Arnar
Agree. I don't have a good feeling about them and they didn't glue very well either.

It's been very busy lately but I plan to do some tests with all of the suggestions here and hopefully fix it.

The tank is still cycle'ing and ammonia is at 1.0 mgr/L when I checked yesterday. The No2 is still 0 so I might need to introduce more livesand to get things rolling but there is no need to rush ;)

I haven't cycled quite so big before and never with so much dry rock.
Click to expand...

Good luck with the test, hope the problem is easily found and able to be fixed as easily.
I also used a little bit of the flex stuff in mine, didn't like it, but the stuff is nice when you need a little offset.

Also just wanted to say I love the sand you have. I was checking it out with the Web Cam(another very nice touch) and love the way it looked. As well as your rock scaping. One question, in some of your past pictures, you mentioned a skull, where is it. I know I'm going to kick myself if it is right in the open or I'm missing something. :rolleyes:
 
If coraline starts to grow then a soak in vinegar for a little while should clean it right up, and without any scratching worries.
 
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