Bottom drain cover height

[Jon W]

Hi All

Just wondered if anyone has a view on what the correct width of gap between dome and pond base for a Spindrifter 2 for the following applications;

1. 4ft deep pond using a Aquamax 10000
2. 8ft deep pond using a Sequence 12000s

Incidently the Spindrifter instructions advise only 20ltrs/min air as max input. Is this true?

Thanks in advance.

Jon

[Gazza]

Hi Jon,

I have seen some spindriffetrs that say 20lts and does it have a small air fitting

Mine has the larger air fitting and i have run a 80 (well did until it packed in) on mine for years without problems.

The gap on the bottom drain i am not 100% sure on as i have had differing answers but mine is about 30mm and works fine.

[Jon W]

Hi Gazza

Thanks for that. I'll give 30mm a go.

The air fitting on my Spindrifter is 3/8". I thought the stipulation re. litres/min might be more to do with damaging the diffuser membrane rather than restrictions imposed by the pipe bore. I have been running 2 220mm disks off an 80 for a couple of years without any damage to disk or pump so I don't think there should be any problems. Obviously I want to whack as much air in as possible.

Cheers

Jon

[steveW]

drain gap = bigger then the crap but less than the fish

seriously 20-30 mm, or roughly upto your third knuckle on your hand

had 40 litres going into my spindrifter, but had to reduce it because the vortex effect of the pond was causing mini air tornados reducing the air flow stopped this, but i still have a clean bottom