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| I bought a Super Luft Air pump this spring for my pond to hook up to the diffuser ring on the bottom drain and a diffuser line I have in where the iris are as that area always seems to get algae.
The problem I'm having is the pump starts to run hot after about 3 hours of running and then stops pumping air. The pump is supposed to pump 65 L/Min output is 3.9PSI. The line to the bd (over the Liner) is about 12 ft weighted black line with bubble defuser line (like a soaker hose) that I got from a pond aeration company. Water is 42" deep. I have a AP50 pump but it really gets the water boiling and is noisy. I'm thinking of taking the Luft pump back to Big Al's as either it's hooped or not right pump for pond. Also with the waterfall aeration which is pretty bubbly adding the aeration on the bd agitates the water alot for waterlilies. |
Follow-Up Postings:
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| The AP50 air pump is supposed to push 50 l/min and the new pump is rated for 65L/min yet it does not cause the water to boil as much as the smaller pump. That tells me a couple of things. There may have been something wrong with the superlift from the beginning. It's a larger pump yet it does not move as much air? That's not right. It also may be that the air ring you put down there is restricting the air flow too much for that sized pump, wich puts back pressure on the pump and makes it overheat. What size is the line leading from the pump to the air ring? |
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| Hi ccombs. The line leading is 1/4" I think--standard air line size. You are probably right about the back pressure as it takes about a minute for the aeration on the bd to even start. I am going to take the SuperLuft back as it's not much quieter than my AP50. Does that Dolphin AP50 need to be covered from the rain etc? I'm thinking about selling it as it really boils the water and is just too much agitation for the waterlilies. Where would you advertise for selling. I've actually never used it as it was loud and boiled the water. |
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| a 1/4" air line is not sufficient for that sized pump. It is designed to handle multiple 1/4" lines. You could use a section of garden hose for an air line or go to lowes and buy some 1/2" clear tubing. The 1/4" line put too much back pressure on the pump and may have blown the diaphram in there. The Dolphin AV-50 can sit in the rain....mine have for several years now with no ill effects. But yours is an AV-50? Not sure if it has a weather proof housing or not. How much do you want for the dolphin? I many be interested in it. Or you can try craig's list. |
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