1st attempt at DWC

Day 71 new res. 14L Ph 5.7 Ec 1.7 Day 72 Test 12L Ph 5.4 Ec 1.8 2L water Ph 7.1 Ec 0.2 Test 14L Ph5.6 Ec1.6 ph up ph5.9 Ec1.6 Day 73 test 13.5L Ph 5.7 Ec 1.6 ph up ph 6.0 1L water with 1ml/L roots ph7.3 ec0.2 test 14L ph 6.0 ec 1.6 Day 74 test 13L ph 5.8 Ec 1.6 Day 75 test 12L ph 5.9 Ec 1.7 water 2L ph 7.0 ec 0.2 test 14L ph 6.0 ec 1.5 Day 76 test 13L ph 6.1 ec 1.6 new res only using Ripen and roots. 4ml/L ripen, 1ml/L roots. 14L Ph 5.8 Ec 1.6 21deg Day 77 test 12.5L ph 5.6 Ec 1.7 25deg water 2L Ph 6.4 Ec 0.2 test ph 5.7 Ec 1.5 ph up ph 6.0 That's the end of week 11. Temps have been hot in the res this week, gave up trying to cool it down. Day 76 decided I was happy to start using ripen for a week to 10 days then plain water for a few days. I have had a look into peltier coolers since MMJMD left a comment about using one to cool the res. They look like they will do the trick but have been looking on the internet to see how well they perform and all I seem to see is people saying there a good idea and purchase a kit and then never say if it worked or not. Surely something like that would work for cooling down my measly 14L of water.