Join Date: Nov 2018
Location: An airpark community in North Carolina
End of Cycle water change needed to save fish?
I am am nearing the end of cycle for a 75 gallon planted tank (tank has been up for about 5 weeks). First week had 2 Endler's, then had an emergency (leak in another tank), and moved over 10 juvenile panda corys, 1 asian stone catfish, and a few mystery snails. Lost one baby cory the day after moving them. Two weeks later moved 5 rili shrimp (other tank leaked again). Unsure if all the shrimp are alive, I haven't seen more than four at a time for several days (but the tank is heavily planted with lots of driftwood and hiding places).
Current water parameters: Water temperature is 74 to 75. PH is 7.2, ammonia 0, nitrite 0.5 ppm (maybe a hair higher, hard to judge the shades of purple for the test), and nitrates around 5ppm (maybe a bit less, the orange is kind of pale compared to the color chart). This is the first day I have had a definitive nitrate reading (the last several days there was only the faintest hint of color change above the zero point).
I am wondering if I should I do a water change to keep the nitrites down? Looking over the fish, one of the smallest baby panda does look a little stressed (the fin on his back seems a little clinched). I've been doing water changes every 2-3 days. I've also been using Prime every second day during the cycle since adding the cory crew when nitries showed up, but I am not due for more Prime until tomorrow. Or should I stick it out and not do a water change since I finally have nitrates, and hope the nitrites zero out quickly? Really nervous about losing the baby corys, I am really attached to the little guys as they were unexpected spawn in my first planted tank.
Last edited by shanmoon; 05-15-2019 at 04:25 PM.
Reason: typo, added photo