Types of fish
I have no saltwater tanks... yet. The closest thing I have to a predator would be my 11-12" Albino Oscar or my 7-8" Jack Dempsey... probably not the kind of predators you had in mind. Had an opportunity to pick up some Piranha a few weeks ago, but I can't sell them and have no place to keep them, even with 45 running tanks.
Lots of African Cichlids and community fish... over 60 different species.
My most gratifying recent accomplishment is seeing a nine inch Tiger Oscar on the mend after his lengthy bout with hole-in-the-head disease.
I also have some small RES turtles.
Every fish I have is for sale for the right price. Most of them will be cheaper than pet store prices, larger fish and more healthy. I get attached to them when they have been around for a long time, so when people ask me, "How much for that one?", (I think, "I'm not too excited about selling that one") I give them what I think is an unreasonably high price. Sometimes they buy them anyway! I won't knowingly sell an unhealthy fish unless the buyer wants to buy him knowing he is sick. I recently sold a Flowerhorn to a man when he offered me $5 after learning that the fish had not eaten for nearly two months. (I'm not a big fan of Flowerhorns... I think they are ugly and too aggressive... just my opinion!
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Most of my income is from the sale and repair of tanks.
My thanks to Kingstature for the plug! I'll try to post some pics soon.