Is the 206 ok for a 40 gallon low-tech planted tank?
1972592
Yes if your bio load is light to moderate meaning number of fish. If you have a heavy bio load use the 306 and regulate the output flow.Good luck
839781
I purchased a fluval 306 for my 60gal tank & the water flow is strong. Depending on how big your next tank will be 206 is suitable up to 45gal, 306 up to 70gal, & the 406 is up to 100gal. You can always adjust the aquastop valve to regulate your water flow without harming the motor, but not sure it may still be too strong of a water flow for a 30 gallon tank. (my fluval filters values are always fully open)
1122400
I would echo what the others have said. Although it's a great light, it's probably not the right light for a planted tank. Unplanted tank that size, I say 2 would be enough.
2022025
I have a 40 gallon tank and I use the large Algone. I am very happy with the product. I have cichlids in my tank.
744813
Might be overkill for a tank that small. I believe Hydor makes a smaller version than the 425 that might be more suitable...
65365
I am using it in a 50 gallon tank. I think the next size would be best if going any larger than this.
1231869
I am using 150w for a 40 gal tank (but it has only about 20 gal water in it).
744814
Greetings, for a tank of little ability I do not particularly recommend it. will have too much turbulence, like a hurricane.Look for a more consistent eg 240 Koralia nano.
50755
If you are growing "easy" low demand aquarium plants you will be fine. I also use FLOURISH with good results. If you are growing water lillys you cant feed them enough so you will have to add fertilizer spikes
2106618
Yes, very well! I have a 55 gal and its the best thing ive ever done for my tank. Plenty, but not too much for a 40 gal
120037
My tank is 30 and this one works perfect since its right in the middle of the ranges. If u have a 20 I'd go with the smaller one.
823804
Yes, as long as the depth from bottom to top is 18" or less. (A standard 40 gallon is 17" I believe, and with gravel the depth is probably an inch or two less than that)
952879
I assume your question is for oxygenating fish, and not hydroponics, so.....I used 1 of these per 250 gal container with 50-60 adult tilapia in it. Realize that you will push less air the longer the tube feeds are, and 9 40s would have to be 6 ft minimum runs on the perimeter, even if you centrally locate pump, so i would probably use 2, just guessing......They are very noisy, mine lasted just over a year ( warranty time ) but i have since found some info on how to rebuild the diaphragm, so i might raise my 1 star review
1050350
Yes it will be ok for it, i have one on my squared 120 gallon tank and looks very good. There are no dark areas in it.
875603
It says on the package up to 55 gallons. I have a 55 gallon and a 29 gallon and I have no problems. It will be perfect for your 40 gallon.
2161474
If I rememer correctly the 24" will work but it won't go across the entire tank so you will have some part either not lit or dinner than the rest. I would suggest going bigger especially if you are going to have live plants.
452752
Yes, as long as you get the right length for your aquarium. It's not going to put out so much light that you need to supplement with CO2. I have low light plants growing great in my 40 gallon, 36" long tank.