I have a Hayward 2 hp super pump 2 and last evening it stopped working so will need to replace after only 2 years of use. I have 2 questions, what pump do you guys recommend, preferably a direct fit and variable or 2speed pump. and also I have a homemade peristaltic 13 dollar pump that pumps chlorine from my chlorine tank to the inlet side of the pump. Did this cause the pump to fail? If I connected the pump to my Stenner injector after pump it would either backfill my chlorine tank or the fittings would blow apart every now and then. So it just made it easier to introduce the chlorine at the bottom of the pump via 3/8 adapter, but maybe this caused premature failure of my pump ?