I'm doing 2.5 gallon all grain brewing. Im doing this to get my techniques down. One issue that I am having is getting my mash temperature at the target. Im using a 5 gallon igloo with false bottom. Im use Beersmith to calculate strike water. For 5.85 lbs, BS recommended 8.82 qts of strike water at 169.4 F. Took grain and tun temp both at 74F. Added strike water to to tun. Let rquilibrate for 5 minutes. Added grain and stirred. Temp at 150, but recipe called for 154 ( wheat beer). Added 32 oz more water at 180F. This didn't change much. Did not use Mash Adjust. So what do I need to do for future small batches?