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Old 02-03-2005, 11:46 PM   #1
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overflow box

hi,i have 1 300gph overflow on my 75gal,a 600gph pump in the fuge that ihad to slow down to keep the tank from spilling on the ground. it's been 1 1/2 yrs no problem. now the overflow box should have 1in of suction when working fine, this is not the case now, it has 1/8 in. bad. i turned the pump down and the water went right back to 1 in, perfect i thought till i looked in the overflow box the water was barly going down the flow rate is very slow now. i cleaned the screen on the overflow also. do i have to cut the pvc and replace it? the check valve on the return side does not hold the water anymore when power goes out. thanks. i'm thinking alga build up. thanks.
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Old 02-04-2005, 12:04 AM   #2
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check the "u" tube for algae, sponges, or built up air bubbles. i have to re prime mine about once a month cause of microbubbles
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Old 02-04-2005, 09:44 AM   #3
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no u tube, this is a cpr. i,m using a penguin 300gph power head to run it.
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75gal oceanic with 20 gal refugium, 750g.p.h.pump for HSA-250 skimmer, EHEIM-1250 PUMP FOR 200gph mincal. calcium reactor with 20lb co2 tank and co2 regulator with solenoid, 800G.P.H. overflow box pump and filter, aquaclearl 500 power filter for circulation and carbon use only,wave maker 900, 3x300g.p.h., pinpoint ph controller, delta star 1/3hp chiller.with 600g.p.h. pump, spectrapure automatic liquid level controller for the addition of ro.di.top off water, kent marine 4 stage delux maxxima 35g.p.d. hi-s, t.d.s. monitor, flush kit, 170lbs live rock, 5in sand bed, acropora's LG green,pink, and med purple, LG montipora encrusting purple, LG porities coral yellow, LG ruffled ridge coral, LG starburst coral green, green hairy mushrooms 100+, blue mushrooms, red mush, fluorescent green mush,green striped mush, bubble coral, LG finger leather and 2in baby, green ricordia mush, in refugium halimeda plant, caulerpa, and lot's of bug's. 1 purple tang, male and female percular clown's, 1 yellow wrasse
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Old 02-04-2005, 09:47 AM   #4
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Sounds like you have a flood just waiting to happen. There is nothing wrong with hang on overflows, i have two myself, but they are not a 'set it and forget it' type thing. I do about 5 minutes of preventiive maintance on mine every month. This includes shutting the overflow down and cleaning the U tube out with a pipe cleaner brush as well as taking the prefilter sponge out and rinsing it well with warm water.
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Old 02-04-2005, 12:06 PM   #5
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i have a cpr, this has no u tube. the water goes in from tank down, then up this skinny part ,then down and up an into the box which goes to the fuge. that skinny part cannot get there to clean.
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Old 02-04-2005, 12:42 PM   #6
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Im not fimular with the CPR construction. Is there a way to get a flexable pipe brush in there? If not then a replacment might be needed. SOmeone who has a CPR may be able to better advise you.
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Old 02-04-2005, 12:59 PM   #7
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If you are having problems getting a flexible brush to go thru the CPR's wier, You could try to take some thread and let one end "flow thru" the wier while the overflow is in operation. Tie the thread to your flexible brush and pull the brush thru. Hope this helps.
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Old 02-05-2005, 09:57 AM   #8
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excellent Idea, i tried this morning with a piece of white twine after i soaked it because it floated, there is not enough suction. i will try again tonight with a 700gph pump to the cpr.gotta go to work.
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75gal oceanic with 20 gal refugium, 750g.p.h.pump for HSA-250 skimmer, EHEIM-1250 PUMP FOR 200gph mincal. calcium reactor with 20lb co2 tank and co2 regulator with solenoid, 800G.P.H. overflow box pump and filter, aquaclearl 500 power filter for circulation and carbon use only,wave maker 900, 3x300g.p.h., pinpoint ph controller, delta star 1/3hp chiller.with 600g.p.h. pump, spectrapure automatic liquid level controller for the addition of ro.di.top off water, kent marine 4 stage delux maxxima 35g.p.d. hi-s, t.d.s. monitor, flush kit, 170lbs live rock, 5in sand bed, acropora's LG green,pink, and med purple, LG montipora encrusting purple, LG porities coral yellow, LG ruffled ridge coral, LG starburst coral green, green hairy mushrooms 100+, blue mushrooms, red mush, fluorescent green mush,green striped mush, bubble coral, LG finger leather and 2in baby, green ricordia mush, in refugium halimeda plant, caulerpa, and lot's of bug's. 1 purple tang, male and female percular clown's, 1 yellow wrasse
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Old 02-06-2005, 03:13 PM   #9
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no luck with the string.looks like i will have to take the cpr off the tank,cutting pvc stinks. fishfreek, what kind do you have? you said you have u tubes.
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Old 02-06-2005, 03:21 PM   #10
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troutman11111 buy a pvc cutter. They probably cost less than $15 and work really well.
here is a link to what they look like...
http://www.lowes.com/lkn?action=prod...23091-407-8215
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