Newbie (sort of) fish question
I had a new 120 gallon saltwater tank set up for about a month. I had just put in me and my girlfriend's first fish, a porcupine puffer. It has been in there about a week feeding on krill twice a day. Well this morning we discovered the fish was kind of pale, lost color in it's eyes, and was swimming disoriented almost getting stuck in a powerhead. A check of the water proved that the ph was low (7.4).
I immediately put in some instant 8.3 ph solution into the tank. After a few minutes the disoriented swimming stopped and the color returned to it's eyes a bit. My question is, should I be concerned that our fish is now sick/damaged long term or since the water is okay now is the fish okay now?
That is very hard to say based on the info you've provided and the situation. Can you list water params for ammonia, nitrite, nitrate, and calcium to go with the pH? There will be many things to determine the long term health of your puffer, including the variety in food. That fish can't live on just krill and remain healthy. Puffer's need a variety in their diet, things like Formula 1 frozen food, raw frozen squid, raw frozen scallops, raw frozen shrimp... krill alone isn't enough to sustain it.
The combination of water quality, nutrition, and stress levels are all going to play a part in how much damage is done, has been done, and any recovery the fish may make from it.
How long was the pH low? How long was the fish having problems? Do you know why the pH dropped? What was the pH before it dropped to 7.4? All of these questions need to be answered before anyone can offer even a guess. Anything you can think to tell us about the tank, such as what substrate you have, how much live rock is in the tank, water temp, etc will all help us to help you much quicker.
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