the forum was reworked a few months back and the voting hasnt been fixed 100% yet. william is busy, but he did a wonderful job on the new look. as for shocking the fish, dont worry about it. match the temp as best as you can (i use my hand and guess.) and you should be fine. unless you are treating the tank water to match a ph and or hardness. if you are keeping the fish in straight tap water (of course dechlorinated) then you wont risk shocking your fish. because the ph and hardness should be stable. if you dont keep up with the maitnence on the tank you are doomed for failure, algae, and all sorts of other failures. even in my 55g heavily planted tank i doa 50% pwc weekly. my other tanks i hit for about 60-76%. its impossible to have water too clean XD.