A regualr powerfilter, or at least most of them, have a LOT of blow-by. Here are some tips to use your magnum...(one final note.. if you got big tanks ex..29 and larger...get the magnum 350!--it is a little more..but easier to charge and move, since you have just hoses not the whole unit to move). I am going to modify mine so that I can use hoses.. but I need to make a fixture that will hold the magnum HOT stabile. BTW the hoses need to be 5/8". Get the magnum.. or the vortex if you got the cash. Use only about 1/4 to 1/3 cup of diatom powder... that is about 2-3 scoops with a regualr kool-aid scoop (make sure for yourself before using it).. once you charge your filter NEVER EVER shut it off.. until you are done.. it will drop all the diatom powder off the micron cartrige and not pick it up again. I use a large old kool-aid container (country time lemonaid..) to hold the inlet and out let in while it charges and then place it into the tank and remove the canister (koolaid canister). I took the outlet attachment for the HOT M that was designed for the biowheel (they come with two...) and cut it off so that it only had ONE outlet.. and attached a long hose there.
YOU can get DE from big al's also.. 5llbs is about 13 dollars.. or you can get from a swimming pool shop.. maybe cheaper. Shop around. Diatom filter works REALLY well for cleaning up green water. While the HOT is not the BEST diatom filter, although it is hard to say since I have not used any other ones( I only say it cause it took a lot of work to get my one green water tank crystal clear--about 18 hours with 2 charges total, I am guessing that it was just too dirty to get it all.)...it works good. Order another diatom cartridge (the same one fits both the magnum 250, 350 and H.O.T....) They are cheaper at big al's and worth to have a backup.
Help control the pet population...spay or neuter people won't spay or neuter their dogs or cats!