water-chiller
Active Aqua 0.25 HP Water Chiller (40–92 Gal, Titanium Evaporator)
★★★★4.3 / 5
~$399Buy now on Amazon (opens in new tab)About this product
Keeping nutrient solution below 68°F prevents root rot and dissolved-oxygen loss — Active Aqua's ¼-HP chiller is the benchmark for medium systems.
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