[rollininoh]

hey all, im using 2x 30 gallon tubs, DWC, using 1 inch airstones. 4 per tub. I used some silicone to keep the airlines down, but one popped up,

Whats a good way to weight them down? im scared to use most stuff ive thought of as it can rust

[cough_cough_eer]

I've never grown hydro, but have lots of fish aquariums and I use aquarium gravel or a rock to hold down aristones. They also make ceramic weights that clamp onto the tubing near the aristone.

Suction cups keep mine down pretty good. If not I might look at a piece of corral or something rock like from the fish store

Tex

I saw a few people on OG do something to keep them down. The got about 2-3 inches of Vinyl tubing Put a hole in the middle for the air hose to go thru and on the open ends STUFF some marbles in the holes and voila weighted airstones.

Blatant

[Hooked-On-Grown]

hey all, im using 2x 30 gallon tubs, DWC, using 1 inch airstones.

I think your problem is the 1" airstones. I have 50 gal res tanks and have 2-4" airstones in each. They stay on the bottom just fine from there weight. 1" stones are to lite and float. Put in 4" airstones and see if that helps. If you have to add another pump and stone, they are cheap and do not suck up any power.

[rollininoh]

yea i really like the 1 inchers, i bought some of the self waited bubble walls, but i dont get the popping water at the surface as much, u think it would be ok to use like stainless steel washers or something to hold em down? fish store didnt have any suction cups

[rollininoh]

bah, was gonna use some washers to hold it down, tried takin airstone off and it broke. now im just gonna drain it and silicone it down, put in new airstone and be done with it

im sure epoxy would work great if that silicone stuff isn't cutting it.

THC

[rollininoh]

i thought about using an epoxy, but ive never seen one that wont break down in water/chems. silicone wont break down, i just wasnt paying attention ,the thing i was using to hold it down while it cured musta moved . drained the tub just now, gonna have to go buy a new airstone

Do airstones degrade if u use them then leave em dry for a while?

[homegrownsweets]

at walmart and pet stores they sell 12-14 inch air rocks and they sink directly to the bottom they have some that they sell with larger and smaller bubbles get the smaller bubbles as it works better for your plants