i have a 90 gallon tank and 2 filter/pumps that can handle 150 gallons each... how frequently would i need to change the water? since it is a fairly large tank, i'm thinking 25% every 3 weeks should do it.
i've heard that it is nearly impossible to tell between a venomous octopus and a non-venomous one... is that true?
i've heard that it is nearly impossible to tell between a venomous octopus and a non-venomous one... is that true?