Algae eater/ sucker fish question?

Your fish will be in extreme danger in a couple to 3 weeks. This will be the point where your ammonia will spike as the new aquarium cycles. Shortly after that you will see a spike in the nitrIte level, which is also extremely poisonous to your fish. At about 6 to 8 weeks the ammonia and nitrItes will drop to 0 and you will start seeing increasing levels of nitrAtes. THAT is when your aquarium will be safe for fish. I can't imagine that the solutions they use to pickle cubers are any good for the water in your aquarium either. You need to study a lot on how an aquarium works and cycles before you are ready to keep tropical fish. www.fishlore.com has some great info on how to set up and cycle an aquarium without harming any fish.