I commend you for your awesome efforts and I sincerely hopes everything works out. Keep us posted!
The wc are key but fluctuating temps aren't going to help, any way you can start an easy and slow drip, siphon in a drain or outside, have incoming hot water in the tank via hose, just dose dechlor every couple hours, make it run somewhat slow, you can pinch the siphon line with a clamp or whatever to slow it down and match the incoming hot water. Obviously you would have to keep an eye on it but as long as the level stays the same it will work.
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*Go S. Vettel #1 rb8--3 MORE RACES LEFT! LET'S MAKE IT 5 BACK TO BACK WINS & 3 WDC!* :beer: