Ocean free hydra filter - The Planted Tank Forum
  • 2 Post By StevieD
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post #1 of 4 (permalink) Old 11-30-2017, 01:40 PM Thread Starter
Algae Grower
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Just stumbled on this newish filter at my LFS and wondered if anyone has 1 in use and whether it lives up to the blurb from the manufacturer (ruduces ammonia nitrites to zero and nitrates to almost zero ) in no time
no need to cycle a tank !!!

Last edited by TCP; 12-08-2017 at 03:47 PM.
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post #2 of 4 (permalink) Old 11-30-2017, 01:54 PM
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Mechanically the OF looks like an old Marineland canister filter. Not sure what the breakthrough technology could be? These filters are only as good as the gasket on the main seal imo.
You need bacteria to colonize somewhere and that takes time to develop I would think.
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post #3 of 4 (permalink) Old 11-30-2017, 02:59 PM
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The easiest way I have found to cycle a tank is to get a sponge filter that has been used for a while and squeeze all the crap out of it into the new tank.

24 hours later clear water and a cycled tank.

This filter to be honest doesn't look to be that different from the Rena XP XL which is $50 cheaper.

At the end of the day as king kong said cylinder filters are only as good as the seal, and unless you have an alarm on when your water is getting low they can be a silent killer.

Even twenty gallons of water can go a long long way.
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post #4 of 4 (permalink) Old 12-08-2017, 07:00 PM Thread Starter
Algae Grower
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Well I bought one anyway it's early days but I've already noticed the water is crystal clear and the nitrates are down not sure I'm to concerned with the "how" as long as it keeps working and my fish are happy

As I haven't mentioned my tank its a fluvel 240 fluvel 304 filter (plus ocean free hydra 40)now!
it's been cycled about 9months I have several plants and some live stock 4 pearl danios 8 tetras 5 cherry barbs 4 juvenile sae 5 dwarf loaches (no more snail problems) 2 sailfin mollies 3 small angels 4 dwarf African frogs 4 bamboo shrimps
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