Auto-dosing equipment and questions... - Fertilizing - Aquatic Plant Central

Go Back   Aquatic Plant Central > Special Interest Forums > Fertilizing

Fertilizing Science of Aquatic Fertilizing - Discuss fertilizing techniques and proper aquatic plant nutrition here.

Reply
 
LinkBack Thread Tools Display Modes
Old 05-18-2005, 05:07 AM   #1 (permalink)
Senior Member
 
Laith's Avatar
 
Join Date: Sep 2004
Location: Geneva, Switzerland
Posts: 2,307
iTrader Ratings: 0
Laith is a valuable member of the community Laith is a valuable member of the community
Default Auto-dosing equipment and questions...

I'm putting together an auto-dosing setup for a new aquarium (200l) that I'm installing. Will be using two peristaltic pumps; one for macros and one for micros. I've got some questions:

- I want to dose directly into the output hoses of an Eheim 2126. These should work shouldn't they?:

http://www.aquazoo24.de/product_info...a63a71dd31b2ea

Any issue with getting two of these and putting them on the output hose?

- Can someone confirm these calculations for me?:

If I mix up 1 liter (1000ml) of water with the following: 30g KNO3, 12g K2SO4 and 12g KH2PO4, each 50 ml dose of this mix added to 175l effective water volume will give me 5.5mg/l of NO3, 5mg/l of K and 0.25mg/l of PO4?

And if I add 2.7g of CSM+B into 1000ml, 50ml of this solution will add 0.05mg/l of Fe into my tank?

The reason the above uses 50ml per dose is that I may choose the AM dual doser which has a minimum dose of 50ml/minute. This doser becomes more interesting than the APT doser (very small volumes per minute) if I decide to increase the stock solution in order to use it for top-off water as well (it will be an open top tank).

All inputs welcome!
Laith is offline   Reply With Quote

Advertisement [Remove Advertisement]
Old 05-18-2005, 05:49 AM   #2 (permalink)
Senior Member
 
Praxx42's Avatar
 
Join Date: Mar 2005
Location: DFW, Tejas
Posts: 256
iTrader Ratings: 0
Praxx42 is a regular member
Default

My only concern is that you'd be plumbing the end of a light-pressure system (perstaltic) into the return for a higher-pressure system (Eheim). I know perstaltic pumps are supposed to prevent backflow, but that's under normal atmospheric pressure. I don't think, IMO, that they would be able to withstand the water pressure coming off the return from the Eheim.

And it's too early for me to be doing math. Someone with more active braincells should be able to check your work.
Praxx42 is offline   Reply With Quote
Old 05-18-2005, 07:21 AM   #3 (permalink)
Member of SCAPE
 
Join Date: Feb 2004
Location: San Juan Capistrano, CA
Posts: 886
iTrader Ratings: 3
iTrader Positive Rating: 100%
IUnknown is a regular member
Default

Yeah, I put a check valve right off the Tee. Also make sure the Tee is pointed up so that the minerals fall into the flow from gravity.
IUnknown is offline   Reply With Quote
 
Old 05-18-2005, 02:35 PM   #4 (permalink)
Senior Member
 
Laith's Avatar
 
Join Date: Sep 2004
Location: Geneva, Switzerland
Posts: 2,307
iTrader Ratings: 0
Laith is a valuable member of the community Laith is a valuable member of the community
Default

Yes, check valves sound like a good idea.

Regarding the pressure from the Eheim, wouldn't the vast majority of that pressure be directed down the path of least resistance; straight down the larger diameter hose?

If the pressure is such an issue then how are the ferts going to enter the flow of water at all?
Laith is offline   Reply With Quote
Old 05-18-2005, 02:43 PM   #5 (permalink)
Member of SCAPE
 
Join Date: Feb 2004
Location: San Juan Capistrano, CA
Posts: 886
iTrader Ratings: 3
iTrader Positive Rating: 100%
IUnknown is a regular member
Default

I was thinking more of a barrier to keep from the fertilizer from mixing. The pressure might suck some of the fertilizer from the line.
IUnknown is offline   Reply With Quote
Old 05-19-2005, 02:08 AM   #6 (permalink)
Senior Member
 
Raul-7's Avatar
 
Join Date: Feb 2004
Location: Lomita, CA
Posts: 1,574
iTrader Ratings: 10
iTrader Positive Rating: 100%
Raul-7 is a regular member
Default

Sorry to bud-in, but I have questions regarding auto-dosers that are of importance. Do you not worry about nutrients settling? In that case, how would you know you have a sufficient dose of each nutrient each time the doser turns on?
Raul-7 is offline   Reply With Quote
Old 05-19-2005, 03:35 AM   #7 (permalink)
Senior Member
 
Laith's Avatar
 
Join Date: Sep 2004
Location: Geneva, Switzerland
Posts: 2,307
iTrader Ratings: 0
Laith is a valuable member of the community Laith is a valuable member of the community
Default

Hehe... that was going to be one of my next questions!

Anyone have a chance to double check my dosing calcs?
Laith is offline   Reply With Quote
Reply


Aquatic Plant Central > Special Interest Forums > Fertilizing > Auto-dosing equipment and questions...

Thread Tools
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 On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Aquatic Plant Forum Replies Last Post
Questions on Pruning equipment.......... markstr General Aquarium Plants Discussions 2 09-29-2004 10:18 PM


All times are GMT -8. The time now is 02:45 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

Search Engine Friendly URLs by vBSEO 3.6.1