Probably a common one. Taking the lid off these and putting the foam media on top then cutting/stabbing some slits into the foam to insert roots/stems is an easy method. If you keep an eye on root growth you can also pit plants on the intake side of the filter-just make sure the roots don't grow down and clog the impeller. The only issue with this method is when it comes time to clean the filter media (or change it out as it breaks down) it can be a bit more messy. I use to keep pothos on the HOB until it started getting big
This is my aquaclear 70 over grown with plants, can't eve see the filter any more except the intake pipe ^^
Foam trellis rafts
(no longer using)
Don't see these much anymore-black foam with velcro (meant to attach to what was basically a shower caddie with velcro glues onto it). I have calcium rich water though so these tend to get white crusties on them over time..
My favorite (and cheapest) method, I get mine at the local grocery store for $2(small) and $3(long). You can also check dollar stores.
I've replaced 85% of my planted suction cups with coated wire that hangs over the tank trim/frame-wire is looped through the suction cup holes and twisted together on the back so the exposed wire stays out of the tank. My substrate of choice for these is an expanded clay media I had leftover from doing aquaponics (very similar to ripariums but with edible plants and plants/roots kept separated from fish). Its light weight and wicks up moisture. The caddies had slits which let water and and roots grow out but you need a screen or cover if you want to use fine sand in there, gravel is fine but it is heavier and weights the caddie down.
Plant lists for these is long..
Aluminum plant (Pilea Cadierei)
Friendship Plant (Pilea involucrata)
Peace Lily (Spathiphyllum "domino")
Dwarf Palm Neanthe Bella
Marble Queen (pothos)
Prayer Plant (Maranta leuconeura)
Aglaonema (Chinese evergreen)
Arrowhead Plant (Syngonium podophyllum 'Cream Allusion')
DIY caddy fix:
Semi free floating/Simple diy trellis
My husband cut slits in the DIY Lexan lid of my tank ad I make a simple trellis/net from fishing ling to train a vine on, its doing well and the roots are free floating in the tank. Its not too pretty yet but it should grow in/thicken up and look nicer with time.
Philodendron silver leaf
Also used fishing line to secure a (now) monster pothos vine to my back background behind the riparium on the 55g, the base of the vine/roots are free floating in the tank.
I've had emersed riccia and stem plans like luqwigia and creeping jenny on my driftwood in the past... same issue with calcium deposits on the emersed part of the wood though (riccia does a nice job of hiding it).