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cmor1701d 03-24-2003 12:48 PM

Bubbles/particulate from powerhead?
My tank is about a month old. Particulars are below.
I have a lot of tiny clear/white particles in my tank. Several times a minute my Hagen 802 powerheads emit a stream of these into the tank. I have a short video but it's too big 2 upload here. A picture doesn't quite show it, they look like streaks but are separate dots. Hard to tell if these are tiny air bubbles or something else.
Does any one else have these or know what they are?

Ph 8.2
NH3 0
NO2 0
NO3 5
SG 1.025

125 gal FOwLR (2/15/03)
DSB 5"-6" (Southdown added 3/1/03)
Acqua Clear Aquatics 125 trickle filter without bio balls
2 Hagen 802 powerheads
4 - 30w fluorescents
Rio 2500 pump in sump (Mag7 as standby replacement)
300w heater in the sump.
25w Coralife UV sterilizer (connected but not in use)
50 lbs of base rock (added 2/22/03)
95 lbs of LR (50# added 2/22/03, 45# added 3/4/03)
1400VA UPS

some turbo snails, scarlet & blue hermits
1 serpent star
2 peppermint shrimp
1 Green Chromis
1 Coral Beauty Angel - Centropyge bispinosus (} {}

reefrunner69 03-24-2003 12:58 PM

Sounds like air bubbles. Sounds like the PH is cavitating and that is the source of the bubbles.

loganj 03-24-2003 01:33 PM

I'm thinking that the Hagen PH's are adjustable for flow. Try changing the flow adjustment one way or the other. This may help with the cavitation. Are you seeing any of this from the sump return?
Logan J

cmor1701d 03-24-2003 01:46 PM

I'll try to get someone to remove the filter inserts and see ih that helps. Should I remove and clean them? They were in and running when I added the Southdown last month. The original filters were caked when I took them out.

cmor1701d 03-24-2003 01:48 PM

Hi Logan,

Not happening from the sump return. I might be able to reach in and try the flow adjustment myself.


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