Canreef Aquatics Bulletin Board  

Go Back   Canreef Aquatics Bulletin Board > General > Reef

Thread Tools Display Modes
Old 02-18-2019, 11:04 PM
DKoKoMan's Avatar
DKoKoMan DKoKoMan is offline
Join Date: Dec 2016
Location: Edmonton
Posts: 1,250
DKoKoMan is on a distinguished road

Originally Posted by TimT View Post
To figure that out you need to find out how much water your tank uses on a daily rate and it's daily Phosphate production. Then add the appropriate amount of Foz Down to the ATO reservoir.

For example: Assuming 300 gallon tank heavily stocked with fish with about 240 gallons of water volume.
Tank evaporates 1 gallon of water a day. Reservoir holds 5 gallons.

Morning Phosphate reading of 0.08mg/l

Phosphate reading 24hrs later of 0.12mg/l

Tank volume of 240 gallons of water = 240 * 3.78 = 907.2 Liters

Daily Phosphate production = 0.12mg/l - 0.08mg/l = 0.04mg/L * 907.2 L = 36.29mg of Phosphate produced per day.

1 drop of Foz Down removes 0.04mg/l from 37.8 Litres = 1.512mg of Phosphate.

36.29mg of Phosphate needs 24 drops of Foz Down to neutralize it.

Your tank would need 24 drops of Foz Down per day to neutralize it's Phosphate production.

The ATO reservoir holds 5 days of water so you would add 5 * 24 drops of Foz Down to it.

1 ml is roughly 20 drops so you would add 6 ml of Foz Down.

An 8oz bottle of Foz Down is 240ml. So there is 40 dosages in the bottle. 1 dosage = 5 days so 1 bottle of Foz Down would keep Phosphates down in your tank for almost 7 months. That works out to about 15 cents a day for a heavily stocked 300 gallon system.

Hope that helps.
Thanks Tim! That was super informative and broken down well for dosing within the ATO. Much appreciated!
300g Basement Reef - April 2018
Reply With Quote
Old 02-19-2019, 04:51 AM
TimT's Avatar
TimT TimT is offline
Join Date: Nov 2001
Location: Courtenay, BC
Posts: 600
TimT is on a distinguished road

My pleasure and glad it was helpful!
__________________ - Foz Down - an easy way to eliminate algae outbreaks caused by Phosphate and bring back the fun of reef keeping.
Reply With Quote

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
Forum Jump

All times are GMT. The time now is 11:31 AM.

Powered by vBulletin® Version 3.7.3
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.