Go Back   Aquarium Advice - Aquarium Forum Community > General Aquarium Forums > General Hardware/Equipment Discussion
Click Here to Login

Join Aquarium Advice Today
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
Old 07-17-2006, 04:58 PM   #21
Aquarium Advice Addict
Lonewolfblue's Avatar
Join Date: Jul 2005
Location: Wenatchee, WA
Posts: 8,435
Send a message via ICQ to Lonewolfblue Send a message via Yahoo to Lonewolfblue

55G Filstar XP3 - 16" Fire Eel
75G Medium Planted - Filstar XP3 Low Light - Established Feb 2006
Lonewolfblue is offline   Reply With Quote
Old 07-17-2006, 05:11 PM   #22
Aquarium Advice Freak
Join Date: Jun 2006
Location: Richmond, Virginia
Posts: 476
One thing I do is run very hot water through the python for several minutes before switching tanks. It's not going to kill bacteria, but I doubt that algae and parasites will enjoy it much.

src is offline   Reply With Quote
Old 07-18-2006, 10:54 AM   #23
Aquarium Advice FINatic
Join Date: May 2006
Location: Olathe, KS
Posts: 920
Send a message via AIM to JRagg
Originally Posted by pkillur
Yeah. So, in theory I have a 360 gph pump on my Fluval 404 with max head of 6 ft, so probably the flow is cut in half for the threeish feet it goes up and into my tank. So, at 180 gph (in a perfect world) it takes 25 minutes to disolve all the chloramines. This is all in a perfect world with perfect flow, etc though. I suppose it's not too bad...
To be honest you're getting more than 180 gph. I'm an engineering nerd, and I deal with pumps and pump curves all of the time. You're probably getting somewhere near 85-90% of your max flow I would guess. You can't really tell that without looking at the curve, but with the way curves are shaped for a centrifugal pump that is probably a moderately accurate estimate.

Also, you have to figure that the flow stirs up the rest of the water too. Just like how it's possible to blow up a trash bag with one breath (of course it depends on the size trash bag ). You move the trash bag away from your mouth about 1.5 feet and blow. The air that comes out of your lungs makes more air move into the bag. This is sort of the same theory. If you put a few drops of food coloring in your tank (in front of a water flow), I'm sure you'd see it fill the tank uniformly within about 20-30 seconds tops.
JRagg is offline   Reply With Quote
Old 07-18-2006, 03:19 PM   #24
Aquarium Advice Regular
Join Date: Jul 2003
Location: Old Town Tacoma
Posts: 88
Originally Posted by dont155
For the Python syphoning issue, I discovered quite by accident that I could in fact, increase the suction a bit. The "problem" was literally at the tap. The part that goes on the water spicket isn't supposed to be "rotatable". That is, when mounted, the part should not easily rotate to accomodate the direction the hose is coming from. If it does, then its loose and is leaking air which, of course, reduces the suction. You need to tighten it up so it doesn't spin.
Nice tip! Thanks!
Sesos is offline   Reply With Quote
Old 07-18-2006, 04:07 PM   #25
Aquarium Advice FINatic
Join Date: Mar 2004
Location: Utah USA
Posts: 865
JRagg, the loss of flow isn't as much about the reduced flow through the curved hose as it is the fact that he is lifting the water in the tube. If the source water is lower, water wants to siphon out of the tank so the pump is working against it. Check out this link . Look at the RIO 800HP. With no rise it pumps 211 gph, but at three feet of rise its down to 100. The larger the pump, the less percentage loss. Add in the curve and figuring for 50% of max is not unreasonable.
Long live the UGF!
Apocalypse_Gold is offline   Reply With Quote
Old 07-18-2006, 06:30 PM   #26
Aquarium Advice Freak
Join Date: Nov 2003
Location: Long Island NY
Posts: 352
Send a message via AIM to degbowl
I have three tanks setup and I have used the python for years. I know if I had to use buckets to do water changes I wouldn't be doing as many. I do the tanks once or twice a week and gravel vac some of the gravel each time. My tanks and fish are healthier and it is much easier to do. If I worked in a lfs I'd rather sell someone a python and some prime and know that they will be doing pwc's than not doing as many pwc's and the customer ending up with unhealthy fish.
degbowl is offline   Reply With Quote
Old 07-18-2006, 07:22 PM   #27
Aquarium Advice FINatic
Join Date: May 2006
Location: Olathe, KS
Posts: 920
Send a message via AIM to JRagg
When I was saying the word curve I meant the pump curve. You can draw one based on the data points on that table that you looked at. Here is a page that talks a little bit about pump curves. The drawing there is pretty poor, but it gets the point across.

His particular pump would be closer to the RIO 1100 than the 800. It has the same shutoff head and close to the same runout flow.

That particular one gets about 62% of its max flow in pkillur's case. Adding in any head loss could possibly take it below 50%

I guess I'm used to dealing with much larger pumps. The larger ones on that site support what I had said earlier.

In any case, the second paragraph of what I had said still holds. With all of the flow created by the filter pump, it would not take long for the dechlorinator to be evenly spread around the tank. Doesn't have to go through the pump to make it mix. It's the flow and turbulence in the water created by the pump that matters.
JRagg is offline   Reply With Quote
Old 07-18-2006, 09:51 PM   #28
Aquarium Advice Activist
Join Date: May 2006
Posts: 122
These pump curves don't apply to canister filters because canister filters do not have to fight gravity. The water level in the tubes is automatically level with the tank and the weight in the out tube is offset by the weight of the in tube.

I think
SkullJug is offline   Reply With Quote
Old 07-18-2006, 10:53 PM   #29
Aquarium Advice FINatic
Join Date: May 2006
Location: Olathe, KS
Posts: 920
Send a message via AIM to JRagg

The pump curves still apply (they should always apply), but the 3 foot head doesn't.

The backpressure is still greater than zero, but that definitely increases the flow some.

10g Heavily planted - 1 mating pair of Apistogramma Cacatuoides "Orangeflash" and a whole lot of MTS
JRagg is offline   Reply With Quote


Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Question on Python?? motherspice Freshwater & Brackish - General Discussion 7 06-26-2008 04:30 PM
python question cogburn General Hardware/Equipment Discussion 5 06-25-2008 08:17 PM
question about Python Jwern07 Freshwater & Brackish - General Discussion 2 03-16-2008 06:56 PM
Python question coldmachineUK Freshwater & Brackish - General Discussion 6 11-06-2006 03:16 PM
Python Question CaptnIgnit Freshwater & Brackish - General Discussion 5 09-09-2006 09:47 AM

» Photo Contest Winners

Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -4. The time now is 10:56 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2018, vBulletin Solutions, Inc.