5x turnover enough for frag tank

Charlie97L · 09-22-2006, 11:05 AM

guys, as many of you know, i set up a frag tank in line with my main display last weekend, a 20L tank. i was planning on using an MJ1200 to feed water to it, so i'd have 10x turnover... however, that was too much flow for my bulkhead (3/4"). so i went to a mj600.

two questions...

first is 5x turnover enough? I also have another mj600 in there providing flow for the frags.

second... will my pvc drain/durso design affect flow? right now, I don't even HAVE a durso, i was planning on doing one this weekend. right now i just have a 90 degree elbow off of the bulkhead.

i'd really like to get the 1200 going on this, but i just need a little more info... this whole flow area is definitely my weak spot in figuring things out.

thanks!

Warnberg · 09-22-2006, 12:16 PM

I would suggest a powerhead in the tank for flow, your turnover rate of 5X should sufice.

Just my 2 cents

Charlie97L · 09-22-2006, 12:28 PM

yeah i do have an mj600 in tank for circulation, it's just not you know, pushing fresh water through the tank.

BoomerD · 09-22-2006, 01:03 PM

Gotta remember, "turn over" includes ALL sources of flow, not just what passes thru the sump. IMO, 5X thru the sump is a little low, but may suffice.

Charlie97L · 09-22-2006, 01:08 PM

thanks boomer. i'm going to redo the drain set up and see if that enables me to run a 1200, which definitely would prefer. that would put me at 10-12x turnover to the sump.

BoomerD · 09-22-2006, 01:56 PM

What size bulkhead are you using? 1" should flow 1000 gph easily...3/4" 600-800 gph.

Charlie97L · 09-22-2006, 02:06 PM

3/4 threaded bulkhead -> threaded pvc joiner -> 3/4" pvc -> 3/4" 90 degree pvc elbow

down facing 3/4" pvc

tee fitting -> 3/4" pvc -> 3/4" 90 degree pvc elbow -> flex pvc to sump

down facing (off 3rd tee) 3/4" pvc

ball valve 3/4" (for expansion to my fuge)

now, i just thought that the backup from the ball valve might be slowing it down? i'm not sure.

i'm not a pvc expert... if there's a better way to set this up... tell me! the angles might be a problem, or the flex pvc, i have NO idea.

i was going to do a durso with a tee fitting and cap with a hole drilled in it this weekend.

09-22-2006, 11:05 AM	#1 (permalink)
Charlie97L Reef Lobster Join Date: Jan 2006 Location: North Bethesda, MD Posts: 1,288 View Gallery Karma Komment	5x turnover enough for frag tank guys, as many of you know, i set up a frag tank in line with my main display last weekend, a 20L tank. i was planning on using an MJ1200 to feed water to it, so i'd have 10x turnover... however, that was too much flow for my bulkhead (3/4"). so i went to a mj600. two questions... first is 5x turnover enough? I also have another mj600 in there providing flow for the frags. second... will my pvc drain/durso design affect flow? right now, I don't even HAVE a durso, i was planning on doing one this weekend. right now i just have a 90 degree elbow off of the bulkhead. i'd really like to get the 1200 going on this, but i just need a little more info... this whole flow area is definitely my weak spot in figuring things out. thanks! __________________ 40 Breeder, 20H Frag Aquactinics T5s, CPR Fuge, Deltec AP600, AC Jr, WavySea

09-22-2006, 12:16 PM	#2 (permalink)
Warnberg Acropora Join Date: Mar 2005 Location: Tampa, Florida Posts: 1,911 View Gallery Karma Komment Add yours!	Re: 5x turnover enough for frag tank I would suggest a powerhead in the tank for flow, your turnover rate of 5X should sufice. Just my 2 cents __________________ Dave 240 Gallon Tall Tencor (96"L x 30"T x 18"W) 4 250 Watt MH XM10K bulbs 2-54 Watt T5 Actinic Euro-Reef CS8-2-RC Jetstream 1 Calcium Reactor 4 Tunze Turbelle stream 6000 power heads 7095 Tunze controller

09-22-2006, 12:28 PM	#3 (permalink)
Charlie97L Reef Lobster Join Date: Jan 2006 Location: North Bethesda, MD Posts: 1,288 View Gallery Karma Komment	Re: 5x turnover enough for frag tank yeah i do have an mj600 in tank for circulation, it's just not you know, pushing fresh water through the tank. __________________ 40 Breeder, 20H Frag Aquactinics T5s, CPR Fuge, Deltec AP600, AC Jr, WavySea

09-22-2006, 01:03 PM	#4 (permalink)
BoomerD Reef Shark Join Date: Nov 2003 Location: Northern California Posts: 5,637 View Gallery Karma Komment	Re: 5x turnover enough for frag tank Gotta remember, "turn over" includes ALL sources of flow, not just what passes thru the sump. IMO, 5X thru the sump is a little low, but may suffice. __________________ Intelligence is not knowing all the answers, but knowing where and how to find them! www.google.com

09-22-2006, 01:08 PM	#5 (permalink)
Charlie97L Reef Lobster Join Date: Jan 2006 Location: North Bethesda, MD Posts: 1,288 View Gallery Karma Komment	Re: 5x turnover enough for frag tank thanks boomer. i'm going to redo the drain set up and see if that enables me to run a 1200, which definitely would prefer. that would put me at 10-12x turnover to the sump. __________________ 40 Breeder, 20H Frag Aquactinics T5s, CPR Fuge, Deltec AP600, AC Jr, WavySea

09-22-2006, 01:56 PM	#6 (permalink)
BoomerD Reef Shark Join Date: Nov 2003 Location: Northern California Posts: 5,637 View Gallery Karma Komment	Re: 5x turnover enough for frag tank What size bulkhead are you using? 1" should flow 1000 gph easily...3/4" 600-800 gph. __________________ Intelligence is not knowing all the answers, but knowing where and how to find them! www.google.com

09-22-2006, 02:06 PM	#7 (permalink)
Charlie97L Reef Lobster Join Date: Jan 2006 Location: North Bethesda, MD Posts: 1,288 View Gallery Karma Komment	Re: 5x turnover enough for frag tank 3/4 threaded bulkhead -> threaded pvc joiner -> 3/4" pvc -> 3/4" 90 degree pvc elbow down facing 3/4" pvc tee fitting -> 3/4" pvc -> 3/4" 90 degree pvc elbow -> flex pvc to sump down facing (off 3rd tee) 3/4" pvc ball valve 3/4" (for expansion to my fuge) now, i just thought that the backup from the ball valve might be slowing it down? i'm not sure. i'm not a pvc expert... if there's a better way to set this up... tell me! the angles might be a problem, or the flex pvc, i have NO idea. i was going to do a durso with a tee fitting and cap with a hole drilled in it this weekend. __________________ 40 Breeder, 20H Frag Aquactinics T5s, CPR Fuge, Deltec AP600, AC Jr, WavySea

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