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#1
11/18/2003, 01:29 PM
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Best submersible pump at any cost
I'm running an Iwaki MD30RLXT 960GPH external pump now and just cannot get the resonant vibration to go away. The noise is driving me nuts. I use flexible 1" PVC for the return and pickup lines and the head is about 4'. The flow is just right.
I'm thinking about switching to a submersible pump and am looking for the quietest pump available at any cost. My only other concern would be heat transfer of the pump. Any suggestions? Thanks, Dave |
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#7
11/18/2003, 04:42 PM
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MAG's Again, and again !!!
Nick
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5.5 Gallon - 2X32wattPC (50/50), AC300 Fuge,AQ1000 Powerhead,8lbs LR, 6lbs LS, Surface Skimmer |
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#8
11/19/2003, 12:34 AM
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none of those can touch an eheim up to 600gph. Especially for pressure, quietness and high efficiency=low heat transfer. Over 600gph sedras are a good choice. MAGs are also good but produce more heat for flow.
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Reef tanks are like cars, the faster you go the harder you crash |
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#10
11/19/2003, 12:48 AM
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Before going for a pump change you may try this...
If your head is actually only 4' (about 960gph) you may be running the pump outside of their optimal performance range (RLTs are designed for higher heads) which falls within about 7 to 11 ' of head. If you have a valve in the output try slowly closing the discharge valve to increase the discharge pressure (head) and hear for noise change. If it becomes more stable and more like a humm there is were the operation shlud be at. Note that this willl reduce the flow to the again optimal performance range (780gph@7' to 360gph@11'). If you require higher than say 750gph or if the noise continue despite the increase in head pressure then you will need to change the pump.
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Did I write what I wrote? What the heck am I talking about! Well..... Nevermind. |
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#11
11/19/2003, 01:53 AM
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Ok, Im gonna get blasted, but I have to.
MAGS SUCK!!! WORST PUMPS I HAVE EVER HAD! I have a 500, 900, 1200, and 1800. Cheap and noisey!!! I use them in the fishroom downstairs because who cares...but it still bugs me when I hear them buzzing. I had a 1200 and now 1800 in the pond outside, 3000gallons in the ground, and I can still hear it rattle! I must have replaced the impeller on the 1200 a few times by now, and the 1800 is about due (keeps jamming up). Must be cheap magnets or something. Keep in mind that these have only been out for what, 5 years about? The 1200 is about that old and I cant believe it. Started out pretty quiet, but that didnt keep long. Actually, over the 15 years I have been an aquarist, havent had a single danner/supreme product that did stay quiet. Not a one. Luckily, I also keep a virtual museum of eheims, have the 2217, 2229, 2228, 2260, 2028, 2235, 1250, 1260, 1262, etc...I have said it before and again...the best pumps ever. I had the 2228 next to my ear at night when I had a 90 next to my bed. I could put my ear on the housing and actually hear the water swishing sound inside the filter over the silence of the pump. The hobby pump I have of theirs is over 10 years old...never changed the impeller even and still running silent. All eheims are like this. And they just came out with new larger models too! the new ones have flows of 900 and 1200 gph. nice. Rainbow just launched their new quiet-one line...looks like a eheim/mag drive type, but havent heard anything. The fact that their origional quiet ones were really noise makers has me wary though. Worth checking out though, same price as mags and cant be any worse! |
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#12
01/10/2004, 05:33 AM
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Reviving
Noticed that a lot of people liked the Eheim. THere were also a few others, but it appeared most of these were submersible. I thought the better pumps were the external ones. No votes for Sequence?
Again assuming money was not a concern, what is the best pump, taking into consideration noise and heat transfer (minimal)? |
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#13
01/10/2004, 10:51 AM
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isn't this thread best SUBMERSIBLE pump? I think that eheim is prolly the clear favorite in that catagory.
I love my sequence though as an external flow pump
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Excuses are just the nails for the house of failure. |
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#14
01/10/2004, 10:59 AM
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I HAD a rio. It worked but with all the bad press, I couldn't make myself keep it. Sure enough, as soon as I turned it off, it wouldn't start reliably.
Next, I bought a MAG 9. It was NOISY. Now, I have a Dolphin submersible. I'm happy. At least, I have a nice pump for salt mixing. |
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#16
01/10/2004, 12:09 PM
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I have a Dolphin DP 900 and have had absolutely zero problems with it. I am a happy customer.
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#18
01/11/2004, 12:47 AM
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I had used a RIO 3100 for quite some time, until recently. When I shut it off, I could no longer get it to turn back on reliably. I actually had to pull it out of the water and smack it each time to get it going again.
I replaced it with a Dolphin pump, and so far I am quite impressed by the low noise, and flow and pressure seem to be better than the RIO. Not sure about heat transfer, though, as it seems to be higher. I don't attribute this to the pump yet, as there have been several other factors that have changed recently. The Dolphin pumps are *HUGE* compared to the RIO, but I am a happy customer so far....
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In the beginners mind, there are many possibilities. In the experts mind there are few. |
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