Questions about my setup

[stingrayguy]

Hey guys!


New to this forum. I've set up my first hyrdo setup.

I used a 40 gallon fish tank, Painted it black. I made a "floater" out of 1" styro, ya know the pink stuff...

Anyways I made this set up before i knew "ebb and flow" type systems.

My question does anyone use a "floating" type set up? the tank is 36"x18"x18"
I have 9 3" net pots in there. I now know 40 gallons is a bit much for only 9-3" pots..

Few questions
what should my PPM be at? I do have a tds.
One of my pumps or heater is leaking a bit into the water.. Like you can feel a sting if your grounded out and touch the water. is this bad for the plants


I have a 400 watt MH on a track
the tank is heated to 70 F.
2 9inch airstones
2 powerheads with air tubes.
9inch Fan to move air

sorry for odd questions

Thanks!