PH Controller for CO2 system-Advice Needed

[RONY11]

I have a 60 litres net aquarium with rare plants n mosses.
I use seachem fertilizers as per seachem chart have 1 watt/litre.

Meanwhile I'm using CO2 DIY Yeast but as I can see its not sufficient.
I have trouble growing glosso due to lack of CO2.
I am planning to buy a used Eheim co2 system this weekend and need help/advice in deciding which PH controller should I buy.
Attached pls find link to my planted aquarium.

https://picasaweb.google.com/1132292...eat=directlink
I am thinking of buying one out of these two PH Controllers t be attached to the Eheim CO2 system

http://www.ebay.com/itm/WEIPRO-PH-20...11550763432814
OR
http://www.ebay.com/itm/250677554002...=p5197.c0.m619

If any hobbyist has used either of these PH Controllers pls mention the pro's con's of these PH Controllers.

Thnx in advance

 

[sWozzAres]

Are you sure you need a controller?

I had one for many years, gave me peace of mind but ultimately it's not required and alot of people here will say it's does more bad than good.

 

[CeeJay]

Hi RONY11
to the forum

I agree with sWozzAres.
Save your money and put it towards some nice plants (or beer ).
A pH controller is not an essential requirement. CO2 stability is our goal and you don't get that with a pH controller
You are better off controlling it with a solenoid on a timer. Turn it on 2 hours before lights on and turn it off 1 to 2 hours before lights out.
Keeps life simple

 

[Ed Seeley]

Don't buy a pH controller. Buy a unit with a solenoid to shut the CO2 off at night as Cee Jay said and use a drop checker with 4dKH indicator solution to make sure the CO2 is at 30ppm.