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Old 08-20-2014, 09:36 AM   #11
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Quote:
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The 306 is rated for 206gph according to the documentation.

The problem is that most manufacturers publish specs for the pump capacity not the filter itself.
According to everything I've read, the 306 is rated at 303gph.
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Old 08-20-2014, 09:53 AM   #12
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According to everything I've read, the 306 is rated at 303gph.
Yes, that's what my box says as well.

Here's a shot I just took. This is after a filter clean less than a week ago, new floss media and washed the coarse media. No carbon at all, so just one layer of floss (new, from Fluval), coarse and bio media from Fluval.

I realize a photo is not a flow rate, but really -- does that look like 300 gph, or even anywhere in the neighborhood?

This is a two month old filter, brand new impeller cover (that was the first theory), so no clogged lines, etc.



PS. Go ahead, laugh at my home made nozzle. I do have the FLuval one (which puts out a bit more pressure but doesn't do more surface area). Also, this proves Sharpie ink does NOT last -- that was solid black 2 months ago. Next time krylon paint I think. Wish they did Schedule 40 in black.

PPS. I turned it up so you could see the flow, normally it goes out parallel and does a decent job of disturbing the surface.
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Old 08-20-2014, 10:23 AM   #13
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That definitely does not look like 300gph. Or even 150. Very perplexing. I'll be very curious to see how mine does.
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Old 08-20-2014, 11:32 AM   #14
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You know, I was just thinking. Have you tried removing the strainer at the end of the intake to see if that improves the flow? The strainer has a ball in it that, according to Hagen, prevents the water from siphoning out of the intake in case of a power outage.
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Old 08-20-2014, 12:14 PM   #15
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Quote:
Originally Posted by qquake2k View Post
According to everything I've read, the 306 is rated at 303gph.
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Originally Posted by Linwood View Post
Yes, that's what my box says as well.
Yes, just keep in mind that the rating on the box and on the marketing material is the rating for the pump. Not the filter itself and certainly not the filter once you have loaded it up with media.

Here is an excerpt from the manual. Check the column called "Filer Circulation"
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Old 08-21-2014, 05:27 AM   #16
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This is all reasons why I said 406 lol but I did see Petsmarts crazy sale on the 306's and the reason I still use HOB's lol, idk they always work, if the flow drops they just need cleaning or a new filter and then they work again, you can't tell me 3 AC 110's wouldn't filter a 125 just fine lol.
Quote:
Originally Posted by qquake2k View Post
You know, I was just thinking. Have you tried removing the strainer at the end of the intake to see if that improves the flow? The strainer has a ball in it that, according to Hagen, prevents the water from siphoning out of the intake in case of a power outage.
Wouldn't it just go right back in the tank? O.o it's a canister not a sump.

Yeah I don't think Sharpie is good for fish lol, don't they sell black tubing?
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Old 08-21-2014, 10:25 PM   #17
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Yeah I don't think Sharpie is good for fish lol, don't they sell black tubing?
THey are labeled as non-toxic for humans even kinds, I saw others using them, but no more.

No, I can't find any black PVC (e.g. schedule 40 type). Just white PVC, beige CPVC, grey electrical conduit, and yes black irrigation but only tiny stuff and no convenient shapes/connectors/etc.

So today I painted my next set. I hope paint is safe, I've seen a lot of people using that also. Waiting for it to cure.
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