How much seachem purigen (water polishing stuff) to use?

[gregalon]

Hello I have a 250ml bottle of seachem purigen and was wondering how much of it I should use for a 30 litre tank? I have the chemi bag and stuff but im not sure because on the bottle it says 250ml treats 250gallons which means I should technically do 1ml of powder per 4 litres (this is hardly anything!).

Please help, thanks

 

[Tom]

Presumably if you use it all it will just last a longer time?

 

[bigmatt]

I'd stick the whole bag in the filter tray. Purigen can be "recharged" in bleach (rinse throughly afterwards!) when it gets dirty so it doens't really matter how much you use
Cheers
Matt

 

[Piece-of-fish]

I'd probably use about 100ml of it. It is very effective.

 

[viktorlantos]

I'd probably use about 100ml of it. It is very effective.

+1 for 100ml