You made a great decision to come here and learn, but for whatever reason it didn't work out with the PBT. Glad to hear it. I understand that it's hard when you have to depend on your parents for rides and they are not into "another one of your things". I think it's a sound decision to slow down a bit and be more careful about your fish choices. I have a PBT, and I have zero problems with him, but to be honest, it's probably my last PBT. It's a beautiful and active fish, but it so unpredictable. As for the ich situation, at this point is not an emergency for now, but I think you should really consider treating your fish in a QT and letting your DT go fallow. You can always tell your parents that it's for the health benefit of the fish and the future success of the tank. They will probably groan a bit, but they will get it. I get away with it with my wife. You seem young if money is an issue you can always get things secondhand in this hobby. I bought my 220 custom-built acrylic with over 200 lbs of LR, lights, skimmer, stand, etc for $1300. Granted this was over 10 years ago, but you will be surprised. Btw, I sold the same tank with the sump for $100 because it needed to be rebuffed and needed a new stand, and I just wanted it gone. If you like DM me, I can get you a small 15-gal setup from Amazon for a QT next weekend.