Co2 Tablets?

[CezzaXV]

Hey everyone,

A browse on eBay recenlty came up with these CO2 tablets: http/www.ebay.co.uk/itm/CO2-Tablets-Hydroponics-Aquarium-Plant-Coral-Diffuser-/280818620028?pt=UK_HomeGarden_Garden_PlantsSeedsBulbs_JN&hash=item416218167c#ht_930wt_1304

I suspect they're not particularly good news, but as someone who doses ferts and that's it, can these benefit my tank or would they be more trouble than they're worth?

 

[mattyeatsmatts]

With no actual picture of the tablets, it looks dodgy. Why not use liquid CO2?

 

[CezzaXV]

At the moment the cost of liquid CO2 is a bit prohibitive, especially since I'm hoping to get a bigger tank in the next few months and the little kits would be no good any more when that happens.

A box of those tablets would last me 6 weeks in my tank, though I suspected it was too good to be true.