for three days the tanks have been steady at pH 7.6 and ammonia 0.25. My used Eheim filter option fell through so I'm going to get my Fluval canister going in the big tub and an internal filter for the small tub, I'm going to Florida for a week and my inlaws can keep an eye on the fish but won't be comfortable doing any tests. Should I just have them drop in some neutralizers every 3-4 days to be safe?