My reactor was£150 its a gyractor g1000, it came with everything, most dnt include a pump.
Iv just got my pump in the rear chamber.
You would be better off with a 't' piece as you dont want too much flow through the reactor. U may need to add a ball valve to regulate the flow. The hoses just go...
iv had exactly the same problems, i added a reactor filled with phosgaurd (tube filled with media) and after 3 days the algea is dieing off, it a very simple bit of equipment and seems to be very effective
do u test for phosphate?