Hi Toby thanks. I made the dividers at work at the last minute as i was let down by the people i ordered online from. Aquariumdividers.co.uk, don't use them! They are a waste of time, took 60 quid of my money and said they would make and ship the dividers 1st class the next day. That was 8 days ago! And now they don't answer the phone, reply to any voicemails and ignoring my emails. Extremely frustrating when you are up against it. Still made these at work and they worked out fine luckily. The smallest female is only around 5" so want to make sure she gets her food for a week or so. The male is larger so he is in the main tank already but spends most of his time at the divider looking at the 2 females! Been an epic journey with the build but deffo worth it. Thanks very much to your Toby for all the valuable info on the auto drip system and solenoid. All working great and water params are better than i expected. Cheers!!