So when I moved out of my Mom's house I downgraded to a 35 gallon tank and left my 50 gallon empty there. I recently moved back and decided to go back to my 50 gallon tank. I have two figure 8 puffers in a brackish tank. I set up the 50 gallon and used the previous filter (the one on the 50 gallon tank) and my driftwood from my 35 gallon tank. My fish are currently being cared for by my father (long story) and I know he wants me to get them soon. However, I'm afraid I haven't cycled it enough! It's been about 4 days all set up! Will they be ok if I just put as much water from their previous tank into my new one?! I really don't want Petri and Polly to go to fishie heaven. Thanks!