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Deadeye
I thought to let you know that as you suggested, I gave back the fig8 to the pet store and received last night the Tetraodon schoutedeni. I observed him for several hours. It is really peaceful just like the amazon puffers. It did not attack any fish. however, it does seem to be very intelligent that the amazons. this morning, I went to work a bit late, I observed the new Congo puffer, so in the tank full of fries of Bristlenose Plecos and too many cherry shrimps. the new puffer started eating the small size BN plecos until it became full, also tried eating two cherry shrimps as well, the ones that were in small size. so in total it ate 3 BN and 2 shrimps and then he was full and stopped chasing. another thing that I noticed about him/her is that he/she is extremely fast if he/she wants to catch a shrimp. but when not in hunting mode, then he/she is relaxed and explores the tank. I have a lot of small guppies and also long fin Moscow guppies but he/she does not bother nipping any of those. my son is a bit upset that I gave Fig8 away, as we all developed some sense of emotion with that fish. I told my son that fig8 will be better off and healthy in brackish water.
I also managed to trim the teeth of my amazons without the use of any sedation such as clove oil. they are doing well and operation was successful. it was in fact much easier than last time which I did with clove oil. of course I changed the tool this time, I bought a very tiny curved shape nail cutter and that fit very well beneath the teeth. I caught them one by one and and submerged into the water in a net, I cut the teeth.
I am grateful to you deadeye for all of your help and helpful advices. I have learned a lot from you.