hiya set my tank up 3 days ago added a few plants.Today i started with the co2 (been wating for bottle from ebay) unfortunatley im unable to use bubble counter on regulator just yet needs a rubber seal it leaks co2 so i bi passed this i wonder if anyone can help. i set drop checker up for first time got a few probs i put 3 drops of the solution in drop checker and used de-ionized water to top it up till ball just over half full it turned yellow put it in tank and its stayed yellow indicating too much co2 which cant be right as ive only just started using its only on low as i cant check it no bubble counter.many thanks