Started a new 90g reef tank about 2 months ago. Decided to give Triton a chance. Using Apex DOS pumps and on both 3a and 3b I have to use a stainless skewer and shove it in the end of my DOS lines because they jam up with crystals in the last 1/2 inch of the tubing where it does into the sump. No crystallization anywhere else in the 10L jug or the DOS tank..can you please explain what is going on here and why? DOS pumps are Pumping in 7ml over 6 hours individually so after one pump finishes its 6 hours the next one starts rinse wash repeat daily.