Help. How often should I or should I change my reservoir water.

PM, the best prices I've seen for ph/tds meters are through internet fish/aquarium supply stores.

Well it depends on how fast they take it up....for instance mine just started and didn't take up much of anything so far. Im gonna let it go for 1 month....normally I do it every other week. It depends on your rez size also, the bigger the longer it can go.

Thanks Blue Bear that first link you sent me I have already read, thanks tho. The other two are nice I see you really know what your doing when it comes to growing that ganja. I hope my first crop is at least half as good as yours, but practice make perfect. I think by at least my third crop I should have every thing down and have know mistakes. Crusinjimbo i've heard about getting a ph/tds meters at a internet fish/aquarium supply stores too, but I didn't really want to wait for it, so thank you too. Are there any store I could go to that might have a chain across america or is anyone familiar with the philadelphia area. Oh yeah and thanks for the input Cyclonite I have a 10 gallon reservoir and it holds 6 plants if that matters.

Oh yeah, I have a soft white FEIT electric 75 watt 120 volt light and a sylvania 150 watt 125 volt light can I use one of these or do I have to buy a grow light bacause won't have any extra money until I get paid and thats 2 weeks from now.

I was going to get a 500mg/hr Ozone Generator ENALY Air Purifier to get rid of the smell that I will getfrom my plants. Is this good, the auction ends at about 8:30 tonight. Whats the most I should spend on it or should I even get it at all.

If you want seeds you'll only need 1 male and the rest of your females. I would recommend you let the male grow some bananas immediately and rip them off so you can use them for later. That way you can polinate only one female or just one cola and leave the rest as sensimilia (seedless and more potent) colas.
You don't NEED the tds/ppm or the ph meter they're just upgrades you can get for your grow. Spend your money on additives or pizza for your first grow and see if you want to go with a ph/pm/tds meter next time.

I think that a PH pen is a must to avoid major problems and get better results from your grow. I mean if he has a PH of 8 right out of the tap then he may get so many defs that he may not even bring his plants threw a harvest and if he does he may get half of the yield that he could of. Not even good nutes can make up for bad PH and nute lock out.
If anything, recommend the PH strips that you find in aquarium departments like in Wal Mart.
Adieu

well I went out and bought some wardley essentials chlor out (it neutralizes chlorine and chloramines) I thought it would be good to get. Oh yeah what are "additives or pizza for your first grow", also I was going to get wardley essentials PH stablizer. It puts the PH up or down to 7.0, but I don't know if I should get it because is it possible my tap water could be below 7.0. When my harvest gets older i'll ask you about ripping of my males bananas.

Those are products for fish, not plants. I know because I use them. Get something specifically for plants. The ph stuff will make your ph 7. No matter what. 7. That's what it does. If you are growing hydro this number won't work for you anyway but is ok for soil. If you take the time now to do things the right way I can promise you it will save you a LOT of heartache later. Get ph stuff for plants. Don't use stuff for fish (Chlor-out) Get a TDS pen. That is the absolute best advice I can give you.

hanks and what about my lights situation I posted above. Can I use a 150 watt bulb for six plants. Can anyone help thanks.