in your opinion, would I be able to rig this http://www.walmart.com/ip/Tetra-Whi...-Gallon-Acquariums-Power-Filter-1-ct/10291764 up to a 5gl bucket interior and not need an airstone.
I was actually reading another thread that talked about not even really needing airstones in DWC
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That's the exact filter I have in my EZ cloner...also the same brand I got (just the bigger version) for my regular res. You can either hang them, or the hook comes off and they have a second suction cup which you could use inside the bucket. The only problem I see with that is you would have to keep a keen eye on water level. The top spout has to be above the water...while the pump which sits in the bottom of the unit needs to remain under water. Not that big of a deal really...probably a 4-6" range you need to ride. I just preferred to go fully submersible.
I would still go with an air line anyway...didn't read the thread you referenced (sorry) but any time I've seen people not use air stones they still inject air, just open lined. I know for a fact that that works just fine. But I wouldn't count on these filters to add dissolved O2 into your system. And just my 2 cents...as far as air goes...the more the merrier!! I still have an air line in my bucket.
I wouldn't go with that corner filter super cheapo option...you then need to load it with material...the whisper system it $11..!!!
ELEVEN DOLLARS !! Guy, remember what you are growing here...how much cheaper do you really need it to be to justify the expense? Just think of the reduction in nutes alone with lack of change outs. And for eleven bucks it comes ready to go...plug and play. You don't have to worry about what to load them with...the filter bag comes ready to go, and replacement bags are right there. Cheap and easy. No brainer.
Again, just my 2 cents...
KG