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sassyfrassy
07/02/2010, 08:08 PM
I bought a pump - from sump to 65g DT is about 4.5' - 5' - guy recommended I needed a Mag 18 (1200 gph). Plumbed it in and WOW! - LOTS of water flowing into a 65! Of course my overflow would not handle it. So tonight I bought an Eshopp 1200 double overflow - $100.00. I wasn't counting on this extra expense - not to mention I had just bought 2 -Korallia 3s, and 3 Korallia 2s for extra flow. And I was going to use the Eheim 1250 to pump from sump to fuge, which then also gravity drains into DT. But w/1200 gph from the sump, my tank is rockin & rollin! I NEED SOME ADVICE PLEASE. Is the Mag 18 too much for a 65? What about for a 75? Should I take the double overflow back and get a smaller pump & just use the korallias for extra flow in the tank? Also I have sugar sand - which is very pretty but I hate it! HELP!

Anemonebuff
07/02/2010, 08:23 PM
Put a gate valve after the pump(on the return). Restrict the flow and you will be fine, but a Mag 1800 pumps 1800 gph at 0' head. I use a Mag 18 on my 125 with 2 returns.

Fish Ace
07/03/2010, 06:04 AM
At that head a rough guess is that you need a pump for either tank in the 350-600 gph range. Don't waste your money on anything bigger.

outy
07/03/2010, 09:53 AM
lol no kiddding

I use a mag 9.5 with 8' of head from sump in basement to 100g DT with single overflow

Fish Ace
07/03/2010, 10:43 AM
lol no kiddding

I use a mag 9.5 with 8' of head from sump in basement to 100g DT with single overflow

I think that would be perfect for him. Tops out at 600 gph @ 8'.

sassyfrassy
07/03/2010, 12:23 PM
Unfortunately I have already bought the Mag 18 from a seller here on RC who said the 18 was definitely what I needed. What I had originally wanted was an Eheim 1262, but they always got sold b/f I could get them, b/c I don't have a lot of time to spend on RC sellers forum - or a lot of money. However in the long run I would have spent less since my overflow would have handled the Eheim, and with the 18 I'll have to re-plumb too. DOES ANYONE WANT TO BUY A GOOD MAG 18??? LOL

Toddrtrex
07/03/2010, 02:18 PM
If possible, I would use the Mag for a closed loop -- but not for a return pump, going to be too much flow through your sump. Surprised that you aren't having a ton of microbubbles.

For reference, on my 58 (( same footprint as your 65 )), I have a 20 gal sump and I am running about 500 GPH for my return -- with head and it being throttled back.

sassyfrassy
07/04/2010, 06:46 AM
I am not using the Mag 18 - went back to my original 1250 Eheim, which I didn't think was enough flow. Yes the Mag 9.5 or Eheim 1262 (which I prefer) will probably be about right and I could still use my overflow and take the dual overflow back.

lngball
07/04/2010, 11:45 AM
Put a gate valve after the pump(on the return). Restrict the flow and you will be fine, but a Mag 1800 pumps 1800 gph at 0' head. I use a Mag 18 on my 125 with 2 returns.

+1 just put a gate valve to tune it down, I have 125 withMag 18 as well witha gate valve.

nicfo25
07/29/2010, 08:05 PM
Why not just use a ball valve instead of a gate valve??? Just wondering as a gate is like 3 times the price as a ball.

Chris27
07/29/2010, 08:43 PM
The gate valve is just easier to fine tune, a ball valve will work just fine for your purpose.

Chris27
07/29/2010, 08:45 PM
BTW, have you picked up a skimmer or media reactors yet? If not, keep the Mag 18, and plumb it into a manifold, from that manifold you can power a skimmer, supply media reactors, fill a fuge, or supply a chiller....you don't have to ditch it.....use it's power to your advantage.

chimmike
07/30/2010, 06:58 AM
I use a mag 18 for salt mixing in a 55g drum. I love that thing. SUPER powerful :)

sassyfrassy
07/30/2010, 12:43 PM
I bought the mag 18 used w/no inst. manual - can it be run externally outside the sump? I currently run MSX 200 skimmer w/Seica 2500 pump, but I have other hdw. that I've been running off PHs & 1250 back to DT. From the sump I pump water to fuge, DT, 2 Little Fishes GFO reactor, & Carbon reactor. I hadn't thought of a manifold from one pump to power all. I bought some misc. stuff from a guy so I have a 1/2' ball valve, 3/4' ball valve, & 3/4" gate valve. How would I go about setting it up? Just to let you know how knowlegable about plumbing I am, I had to look up "manifold".LOL

outy
07/30/2010, 12:46 PM
you can sell the 18 fairly easy in the classifieds.

chimmike
07/30/2010, 01:21 PM
http://www.dannermfg.com/instructionsheets/ZG100.PDF

sassyfrassy
07/30/2010, 08:20 PM
Thanks for inst. sheet.

wrott
07/30/2010, 08:35 PM
Good advice from above.
A Mag12 is good for a single overflow--still some microbubble issues w/ skimmer and all.
Keep the Mag18 for back-up, use it to mix water--fast--thats what i use. Unless you know the pump is under-rated, always plumb a valve after your return pump so that you can adjust flow in the sump.

I use a Mag12 on my 65g, and a Mag18 on my 120g. The 120g could use more flow through, and both are going through chillers.
As far as flow is concerned, I do not even consider the flow from the sump return in the equation, I have many,many more times flow from PHs---like 80-100x turnover/hr. Fish and corals love it. You can never have too much flow, unless you have sand in you DT--sorry.

Mavrk
07/30/2010, 11:09 PM
Use it for water changes. They will go really fast :)

Giglamesh
07/30/2010, 11:19 PM
lol when i was getting a return pump i was recommended a 16000lph (4200 gph) for a 60 gal. ended up getting an ocean runner 3500. 4200gph what a nostril he was, way to much flow

sassyfrassy
08/02/2010, 09:54 AM
I still like the idea of a manifold using pump for multiple hardware, b/c my sump is so small for my skimmer and there's really no room for adding PHs for reactors. If I plumbed a manifold w/4 outlets, I could use the same pump to pump water to DT, fuge, & 2 reactors (which don't require much flow). Does anyone know if there is a DIY thread that diagrams this type of setup?